10 Symptoms in Cats You Should Never Ignore

Which cat symptoms need an emergency vet right now?

Use the table below to choose your next step. These are the same 10 warning signs explained throughout this guide. A symptom's severity and the other changes happening alongside it can turn a prompt appointment into an emergency.

Suspected poisoning or major trauma needs immediate veterinary advice even if your cat looks normal. Some problems develop before you can see outward signs. A fall, vehicle strike, or possible exposure to a toxic substance is not something to clear at home by watching your cat walk around.

If you are unsure where to go, call the nearest open clinic and describe exactly what you see. Our guide explains when to use an emergency vet instead of your regular clinic. For a red-flag symptom, choose the clinic that can assess your cat now rather than waiting for a familiar office to open.

Why is my cat breathing hard or showing pale gums?

1. Difficult or open-mouth breathing. A cat who breathes with their mouth open, pushes noticeably with their belly, or stretches their neck to get air needs emergency care. Other warning signs include elbows held away from the chest, flared nostrils, or being unable to settle comfortably.

Do not assume this is a hairball, anxiety, or the heat. Cornell's guidance on breathing difficulty explains that labored breathing can have several causes and requires prompt treatment. You cannot reliably identify the cause from how the breathing sounds.

If your cat is comfortable, watch their chest while they sleep or rest without purring. One rise and fall counts as one breath; you can count for 30 seconds and double it. Record a persistent change from their usual resting pattern and call your vet, but do not count breaths before leaving if breathing looks difficult.

2. Newly abnormal gum color. Pale or white gums can signal a serious circulation problem or too few red blood cells. Blue or gray gums can mean oxygen is not reaching tissues normally. These colors need emergency assessment, even if your cat is still awake and responsive.

Yellow gums, or yellow coloring in the whites of the eyes or inner ears, need urgent same-day assessment. This yellowing is called jaundice and can occur with serious illness. It is not a normal change to monitor for several days.

Only look at the gums if your cat is calm and lets you gently lift a lip. Some cats naturally have dark patches, so compare the unpigmented areas with their usual color if you know it. Do not pry the mouth open or restrain a struggling cat to inspect it.

Keep a breathless cat as quiet as possible during transport. Let them choose their position in the carrier, avoid pressure on the chest or neck, and ask the emergency clinic how to move them safely.

Is my cat straining to pee or unable to urinate?

3. Repeated straining with little or no urine. Frequent litter box visits, prolonged squatting, crying, genital licking, or passing only drops can mean a urinary emergency. If your cat keeps straining and you cannot tell whether urine is coming out, seek emergency care rather than waiting for certainty.

A blocked urethra, the tube that carries urine out of the body, prevents the bladder from emptying. Dangerous changes in body chemistry can follow. Cornell describes urethral obstruction as a true medical emergency, with male cats at greater risk because their urethra is narrower.

A cat may still pass a few drops despite a serious problem. Do not use those drops as proof that everything is moving normally. Vomiting, weakness, or a painful belly makes the situation more urgent, but you should not wait for those signs to appear.

Straining can look like constipation. From beside the litter box, it may be impossible to tell whether your cat is trying to pass stool or urine. Tell the clinic, “My cat keeps straining, and I cannot confirm normal urination.” That gives them the information they need to assess urgency.

• Do not press, squeeze, or massage your cat's abdomen.
• Do not give a laxative, leftover medication, or a urinary supplement instead of seeking care.
• Do not wait overnight to see whether another litter box trip succeeds.

Passing unusually large amounts of urine is different from straining without producing it. Bigger clumps and increased thirst need a prompt appointment, as explained below. Frequent small trips can still indicate a painful urinary problem even when some urine passes, so call your vet the same day.

In a home with several cats, uncertainty about whose urine is in the box should not delay care for the cat who is visibly straining. Report the behavior you can see rather than trying to solve the whole litter box mystery first.

What if my cat collapses, has a seizure, or drags their back legs?

4. Collapse or seizures. A cat who collapses, becomes unresponsive, or cannot stand needs an emergency vet now. Even if they seem to recover quickly, call an emergency clinic immediately for instructions. A brief recovery does not explain why it happened or make it safe to ignore.

A seizure may involve falling over, stiffening, paddling legs, drooling, or losing awareness. Some episodes look less dramatic, with twitching or unusual repetitive movements. You do not need to decide whether it was definitely a seizure before asking for veterinary help.

If an episode is happening:

1. Start a timer so you know how long it lasts.
2. Move nearby objects away and block access to stairs without holding your cat down.
3. Keep hands and objects away from the mouth. Cats do not need their tongues pulled forward.
4. Dim lights and reduce noise. Take a short video only if someone can do so safely.

A seizure lasting more than five minutes, or repeated seizures without recovery, requires emergency care. Call while the episode is underway so the clinic can guide safe transport. Repeated seizures in the same day also warrant immediate veterinary contact, even if your cat seems to recover between them.

A first brief seizure still needs prompt veterinary advice. Afterward, your cat may be confused or unsteady. Keep them on floor level in a quiet, safe space while you speak with the clinic, and do not offer food or water until they are fully alert.

5. Sudden hind-leg weakness or paralysis. A cat who suddenly drags their back legs, cries in pain, or cannot use one or both hind legs needs emergency assessment. Cold back paws or breathing trouble add to the concern, but are not required for this to be urgent.

There are several possible causes, including problems with blood flow, injury, or the nervous system. Do not try to diagnose a clot at home, massage painful legs, or force your cat to walk. Minimize movement and follow the clinic's advice for supporting the body during transport.

When are not eating, vomiting, or diarrhea serious in cats?

6. Loss of appetite. Contact a vet before a healthy adult cat reaches 24 hours without eating. That is a point to avoid reaching without advice, not a recommended waiting period. Call sooner for a kitten, a diabetic cat, or any cat who is also vomiting, weak, painful, or unusually withdrawn.

A few licks of gravy are not a normal meal. Note what your cat actually ate and when they last ate a meaningful amount. Several days of eating much less than usual also need assessment, even if there has never been a full day with no food.

Cornell's guidance on appetite loss explains why this symptom deserves prompt attention. Sustained poor intake can contribute to hepatic lipidosis, a serious buildup of fat in the liver, especially in overweight cats. There is no safe home countdown that predicts when this will happen.

While arranging advice, offer a small amount of familiar food in a quiet spot. You can gently warm wet food to make it smell stronger, but do not force-feed or syringe food into an unwilling cat. Read more about why a newly adopted pet may not eat, without assuming adoption stress explains ongoing refusal.

7. Repeated vomiting or significant diarrhea. One vomit or one soft stool in an otherwise comfortable adult cat is different from repeated episodes. You can watch closely after an isolated episode if your cat remains alert, eats, drinks, and has no other warning signs. Call if it recurs or their behavior changes.

Repeated vomiting or frequent watery diarrhea warrants same-day veterinary advice. Seek urgent assessment now if your cat cannot keep water down, becomes markedly weak, passes substantial blood, or has black, sticky, tar-like stool. Possible poisoning or swallowing string or another object also needs immediate advice.

A tiny streak of fresh blood is not the same as substantial bleeding, but still tell your vet, particularly if it recurs. Do not assume repeated vomiting is just hairballs. Cornell's vomiting guidance recommends assessment when vomiting is frequent or comes with other signs of illness.

Do not deliberately fast your cat or give human stomach medicines. Keep fresh water available unless the treating clinic directs otherwise, and get help rather than repeatedly testing whether another drink stays down. Save a stool sample or photo if convenient, but never delay departure to collect one.

Why is my cat drinking more or losing weight?

8. Increased thirst or urination and unexplained weight loss. A water bowl that empties faster, larger litter clumps, or a spine that suddenly feels more prominent deserves a prompt veterinary appointment. Do not save these changes for an annual checkup months away, even if your cat still eats enthusiastically.

Changes can creep up on you. You may first notice that the litter is saturated sooner, your cat visits the sink more often, or their hips look narrower in photos. Weight loss despite a normal or increased appetite is still a warning sign, not reassurance that your cat must be healthy.

Kidney disease, diabetes, and an overactive thyroid are among the conditions a vet may consider. Those possibilities cannot be sorted out by thirst or appearance alone. An examination and tests, often including blood and urine tests, help identify what is happening.

Call today to describe the change and arrange the next appropriate appointment. Seek same-day assessment if increased thirst or weight loss comes with not eating, vomiting, or weakness. Collapse, severe weakness, or abnormal breathing means emergency care.

Useful notes for the appointment include:

• When you first noticed the change and whether it is getting more obvious.
• How often you refill water bowls, accounting for other pets and spilled water.
• Whether urine clumps are bigger, more numerous, or both.
• Changes in appetite and any previous recorded weights.

Never restrict water to reduce drinking or litter box use. Do not change prescribed medication or start a special diet without advice. If home weighing is easy and does not upset your cat, a consistent scale can help track the trend, but you do not need a perfect weight record before booking care.

For a recent adopter, shelter records may supply a useful starting weight. Bring them along, even if the measurements were taken on a different scale.

Is my cat hiding from stress or showing signs of pain?

9. A marked change in energy, behavior, or movement. Persistent hiding, unexpected aggression, a hunched posture, reduced grooming, or reluctance to jump can be signs of illness or pain. Call your vet the same day for a marked change, especially if eating, drinking, or litter box habits have changed too.

A newly adopted cat may spend time under furniture while still coming out to eat, use the litter box, and explore when the house is quiet. That pattern is different from a cat who stays motionless, refuses food, or seems weak when they try to move. Stress and illness can also happen together.

Instead of judging hiding alone, check what your cat can still do:

• Do they wake and respond normally to a quiet voice?
• Are they eating actual meals and passing urine?
• Can they walk comfortably without wobbling or dragging a leg?
• Are they resting loosely, or sitting tense and hunched?

A cat who is difficult to rouse, cannot stand, or appears severely painful needs emergency care. Do not repeatedly poke or pull them out to test their response. Observe gently, then tell the clinic what changed and when your cat last acted normally.

Purring does not rule out pain. Some cats purr when stressed or uncomfortable, and a quiet cat is not necessarily a comfortable cat. Our guides explain when hiding becomes a reason to worry and how to read your cat's body language.

Avoid testing sore areas by pressing them or making your cat jump. Provide an easily reached litter box and resting spot while arranging care, but do not replace an assessment with calming products or joint supplements. Describe concrete changes, such as “she has stopped jumping onto the couch since yesterday,” rather than only saying your cat seems off.

Does a squinting or cloudy eye need a vet today?

10. A painful or suddenly changed eye. Squinting, holding an eye shut, redness, or new cloudiness needs a same-day veterinary assessment. An eye that will not open normally is not something to watch for several days, even if your cat is eating and playing.

Eye pain can look surprisingly quiet. Your cat may blink repeatedly, turn away from light, rub their face, or hide rather than cry. A sudden change in the eye's surface or appearance can involve conditions that threaten sight, and they cannot be distinguished safely from a photo alone.

Contact a vet immediately for sudden trouble seeing or significant eye trauma. Signs of vision loss include unexpectedly bumping into familiar objects, hesitating at ordinary steps, or becoming disoriented in a room they know. Keep your cat indoors and away from stairs while arranging urgent care.

A little crust at the corner of an otherwise open, comfortable eye is different from an eye that is painful, swollen, or cloudy. Persistent discharge still deserves advice, especially with sneezing or reduced appetite. If discharge keeps the eye shut, or you cannot tell whether it hurts, ask for same-day guidance rather than assuming it is mild.

• Do not use leftover prescription eye drops or another pet's medication.
• Do not use human redness-relief drops.
• Do not press on the eye, force the lids apart, or try to remove an embedded object.

Some medications can worsen certain eye injuries, so an old prescription is not a safe shortcut. Tell the clinic about any product already applied and bring its packaging. If a chemical splashed into the eye, call immediately for rinsing and transport instructions specific to that exposure.

Keep handling gentle and prevent rubbing if you can do so without a struggle. Do not delay the appointment to clean the eye thoroughly or wait for a better photo.

What should you do before taking your cat to the vet?

Call the clinic while you arrange transport. Give the main symptom first, then say when it started and whether your cat is breathing normally, responsive, and able to urinate. Confirm that the clinic is open and can receive your cat.

1. Keep handling to a minimum. Reduce noise and keep children and other pets away. Pain can make even a gentle cat bite.
2. Use a secure carrier. A carrier with a removable top can reduce struggling. Do not compress the chest, wrap tightly, or cover ventilation openings.
3. Bring useful information. Pack medication names, supplements, shelter records, and any known medical history. Note when your cat last ate and passed urine.
4. Bring evidence only if safely available. A brief video, photo, suspected toxin packaging, or sample may help. Collecting it must not delay care.

Do not give human painkillers. Acetaminophen and common anti-inflammatory medicines can be dangerous to cats. Do not induce vomiting, give a home antidote, or pull visible string from the mouth or anus. Keep your cat from chewing at it if safely possible, and contact the clinic immediately.

For suspected poisoning in the US, call your vet or the ASPCA Animal Poison Control Center at 888-426-4435. A consultation fee may apply. VCA's emergency guidance for cats includes poison-response advice. If your cat is collapsing, seizing, or struggling to breathe, head for emergency care while someone else calls.

Possible exposure matters even without symptoms. Review toxic plants to keep away from cats, but do not spend time identifying a plant online before seeking advice about a suspected exposure.

If cost is a concern, say so immediately. Ask about the examination fee, an estimate for initial stabilization, and which tests or treatments are needed first. Ask whether the clinic offers payment options or knows local assistance programs, without assuming these will be available.

Future planning, after the current problem is addressed: Schedule your newly adopted pet's first vet visit and find a veterinarian near you before the next urgent situation. Save your regular clinic and emergency hospital numbers in your phone.

You can also plan for future vet bills with insurance or emergency savings. Insurance generally excludes pre-existing conditions, has waiting periods, and is not a way to pay for symptoms already underway. Check exclusions and how reimbursement works before choosing a policy.