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The short answer: when a cat licks itself bald, the cause is usually an itch (fleas, food allergy or environmental allergy) or pain (a sore bladder, sore joints, a sore gut) — not stress, even though stress is the explanation most owners hear first. In a study of 21 cats sent to specialists with presumed stress-related hair loss, 16 turned out to have a medical cause, and only 2 had a purely behavioural one. Where the bald patch is gives a strong clue: belly and inner thighs often mean bladder pain or allergy, the base of the tail means fleas, a patch over one joint can mean arthritis. Start with your vet and a flea treatment for every pet in the house. Stress management, enrichment and — for some cats — calming support come after the medical causes are ruled out. Because we make hemp for pets, this page also says honestly what is and is not known about hemp for cats.
Written by Marc Brannigan, Co-Founder & CEO of HempMy Pet. Last updated 10 November 2026.
Is It Over-Grooming at All? The Spiky-Hair Test
Many owners never see it happen — cats often groom in private. The hair tells you.
- Run your fingers over the thin patch. If the short hairs feel stubbly and spiky, like a man's chin at 5 p.m., they have been chewed or licked off. That is over-grooming.
- Gently tug a few hairs at the edge. If they come out easily from the root with no resistance, the hair is falling out on its own — that points to a hormonal, nutritional or follicle problem, not licking.
- Check the stool and the vomit. More hairballs than usual, or hair in the litter box, means your cat is swallowing far more fur than normal.
- Look at the skin. Normal-looking skin under a bald patch is typical of both allergy and stress licking. Scabs, red spots or raw areas mean itch or infection.
A cat licks where it itches or where it hurts. The patch is a map.
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The Bald-Patch Map
Where your cat is grooming is one of the best clues to why.
| Where | Most likely causes | What else to look for |
|---|---|---|
| Lower belly, inner thighs, around the genitals | Bladder pain (feline idiopathic cystitis, crystals, infection); allergies | Straining, frequent small wees, peeing outside the box, blood in urine. International Cat Care's 2025 urinary guidelines list belly over-grooming as a sign of underlying bladder pain. See cat peeing outside the litter box. |
| Base of the tail and lower back | Flea allergy | Flea dirt (black specks that smear red on a damp tissue), small scabs along the back. One bite is enough to set off an allergic cat, even if you never see a flea. |
| Head, face, neck, ears | Food allergy, ear mites, environmental allergy | Scratching with the back feet rather than licking, scabs around the face and neck, dark ear debris. |
| Over one joint, the hips or the lower spine | Arthritis or other localised pain | Older cat, reluctant to jump, using lower perches, missing the litter box edge. See signs of arthritis in cats. |
| Front legs, flanks, symmetrical stripes | Allergy (most often), or stress-related grooming | A recent change at home — a new pet, a move, building work, a cat outside the window, conflict with another cat. |
| Paws and between the toes | Allergy, a foreign body, a nail problem, or pain | Limping, swelling, a bad smell, chewing at one foot. |
Why Stress Is Usually Not the Answer
Stress over-grooming — vets call it psychogenic alopecia — is real. But it is a diagnosis of exclusion, and it is given far more often than it is true.
The best evidence comes from a study published in the Journal of the American Veterinary Medical Association. Twenty-one cats referred to specialists with a presumed diagnosis of stress-related hair loss were put through a full work-up: skin scrapings, fungal culture, parasite treatment, a food elimination trial, allergy assessment and skin biopsies. Sixteen of the 21 had a medical cause, three had a medical cause plus a behavioural one, and only two were purely behavioural. The most common finding was an adverse food reaction, diagnosed in 12 of them.
That is why a good vet will insist on flea treatment and often a strict food trial before calling it stress. It is not box-ticking; it is where the answer usually is.
What Your Vet Will Do
- A thorough exam and a look at the hairs under a microscope — broken tips confirm licking.
- Skin scrapings, tape tests and fungal culture for mites and ringworm.
- Flea treatment for every animal in the house, for at least two to three months, even if you have never seen a flea.
- A food elimination trial — a prescription or novel-protein diet, nothing else, for around eight weeks. It is strict, and it is often the answer.
- Urine tests if the belly and inner thighs are affected, and X-rays if the patch sits over a joint or the spine.
- Anti-itch medication as a trial — if the grooming stops when the itch is controlled, the cause was itch, not stress.
How to Help at Home
While the medical side is being sorted, and afterwards if stress turns out to be part of it.
- Don't punish or startle. It adds stress and teaches your cat to groom where you can't see.
- Redirect, gently. When you see a grooming bout starting, offer a wand-toy game or a food puzzle.
- Give everything in multiples. In multi-cat homes, conflict is a big stressor: separate food bowls, water, litter boxes (one per cat plus one), scratching posts and high perches, in different places.
- Add vertical space and hiding spots. Cat trees, shelves, a box with a blanket. Cats cope with stress by getting up high and out of sight.
- Keep the routine predictable. Same feeding times, same play times.
- Block the view of a cat outside the window with frosted film on the lower pane.
- Ask about pheromone diffusers — a reasonable, low-risk add-on in some households.
If your cat's grooming started around a change in the home, our guides to cat separation anxiety and a clingy cat cover the stress side in more depth.
Where Hemp Fits — and Where It Doesn't
We make hemp for cats. The evidence in cats is thinner than in dogs, and you should know that before you buy anything.
Most over-grooming cats have one of these, and each has a specific treatment. Hemp is not a flea treatment, not a food trial and not a bladder treatment. Rule them out first.
There is no published trial of CBD for over-grooming in cats. A placebo-controlled study from the Waltham Petcare Science Institute gave cats a single 4 mg/kg dose before carrier travel and meeting a stranger and found no measurable reduction in stress. Cats also handle cannabinoids differently from dogs — we explain how in cats process hemp differently.
Once your vet has ruled out the medical causes, some owners use a low-dose hemp oil as one part of a plan for a cat whose grooming is tied to stress, or for an older cat with stiff joints. That is a reasonable, low-risk thing to discuss with your vet — not a proven treatment. Start low and judge it over weeks.
If you use it: choose a low-strength product made for small animals, start at the low end of the serving guide, and read is CBD safe for cats and CBD dosage for cats first. Never use a product with essential oils or THC, and tell your vet — especially if your cat is on gabapentin or any other medication.
If you and your vet decide to try hemp, start low
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When to See the Vet
Same day if:
- Your cat is straining in the litter box and producing little or nothing — especially a male cat. A blocked bladder is an emergency.
- Raw, bleeding or weeping skin, or a wound your cat will not leave alone
Book an appointment if:
- Any bald or thinning patch, or stubbly spiky hair
- More hairballs than usual
- Belly or inner-thigh grooming, or any change in urination
- Grooming over a joint, or reluctance to jump
- Scabs around the head and neck
Frequently Asked Questions
How do I get my cat to stop over-grooming?
Find and treat the cause first, because most over-grooming is driven by itch or pain. That means a vet exam, flea treatment for every pet in the home for a few months, and often a strict eight-week food trial. If stress turns out to be part of it, reduce conflict and change: separate resources in multi-cat homes, more vertical space and hiding spots, predictable routines, and play to redirect grooming bouts. Never punish — it adds stress.
Should I be worried if my cat is over-grooming?
Worried enough to book a vet visit, yes. Over-grooming that causes thin or bald patches almost always has a reason, and in most cats it is a treatable medical one — allergy, fleas or pain. It becomes urgent if your cat is also straining to urinate, has raw or bleeding skin, or stops eating.
Do cats over-groom when in pain?
Yes. Cats often lick over a sore spot. Grooming of the lower belly and inner thighs is a recognised sign of bladder pain, and grooming over a joint or the lower spine can point to arthritis. Because cats hide pain so well, over-grooming is sometimes one of the only visible signs that something hurts.
What is cobbing in cats?
Cobbing is a gentle, rapid nibbling with the front teeth, the way a cat works out a knot in its fur or grooms a companion — or you. It is normal grooming behaviour and often affectionate. It only becomes a concern if a cat is cobbing one area of its own body so often that the fur thins.
Can stress make a cat lick itself bald?
It can, but less often than people think. In a specialist study of 21 cats presumed to have stress-related hair loss, only two had a purely behavioural cause; 16 had a medical cause and three had both. Stress is worth addressing, but only after itch, fleas, food allergy and pain have been ruled out.
Will a cat's fur grow back after over-grooming?
Usually, yes, once the grooming stops. Expect visible regrowth over several weeks and a full coat in a few months, often a slightly different colour or texture at first. If hair does not regrow after the licking has stopped, ask your vet to look for a follicle or hormonal problem.
What can I give my cat for over-grooming?
That depends on the cause, which is why a vet comes first: flea treatment, a prescription elimination diet, anti-itch medication, pain relief, or a treatment for a bladder problem. For stress-related grooming, environmental changes come first, and your vet may suggest pheromones or, in some cases, anti-anxiety medication. Never give a cat human medicines, essential oils or anything containing xylitol.
Does CBD help cats that over-groom?
There is no published trial showing it does. The one placebo-controlled cat stress study found a single dose did not reduce stress during travel. Some owners use a low-dose hemp oil as part of a vet-guided plan for a stressed or stiff senior cat after medical causes are ruled out, but it is not a substitute for treating fleas, allergies or pain.
The Short Version
Feel the patch: spiky stubble means licking. Look at where it is: belly and thighs suggest bladder pain or allergy, tail base suggests fleas, a joint suggests arthritis. See your vet, treat every pet for fleas, and expect a food trial. Stress is real but usually not the whole answer.
The research on hemp for cats is thin, and we say so. It may have a place for a stressed or stiff senior cat once the medical causes are ruled out — low dose, with your vet's agreement.
Shop Hemp for CatsSigns of Arthritis in Cats →
Arthritis in Cats · Peeing Outside the Box · Cat Dandruff · Cat Separation Anxiety · Is CBD Safe for Cats?
Marc co-founded HempMy Pet in 2016 with his business partner Natalie Mondine, the company's COO. HempMy Pet breeds its own hemp genetics, grows them on its own Colorado farm, and formulates every batch in-house under human-grade standards — seed to sale, nothing sourced overseas. Every batch is third-party tested and the certificates of analysis are published. More about us.
HempMy Pet ran its own 90-day study of 37 dogs with chronic joint discomfort. Of the 32 that completed it, 30 (93%) showed a benefit, and 94% of owners reported their dog's quality of life had improved. It was overseen by Dr. Robin Downing, DVM, MS of the Downing Center for Animal Pain Management, with Lori Kogan, Ph.D. and Peter W. Hellyer, DVM of Colorado State University's College of Veterinary Medicine & Biomedical Sciences, and published in the Journal of the American Holistic Veterinary Medical Association. That trial was in dogs; we do not apply its results to cats. Read the methodology.
Why Dr. Downing: in 2005 she became only the third veterinarian in the world credentialed as a Diplomate of the American Academy of Pain Management. She founded the International Veterinary Academy of Pain Management, is a Diplomate of the ACVSMR, a Certified Veterinary Pain Practitioner and a Certified Canine Rehabilitation Practitioner, and was the AVMA's 2020 Bustad Companion Animal Veterinarian of the Year. Read the published paper (PDF).
This article is general information for cat owners, not veterinary advice. It is reviewed and updated as new peer-reviewed evidence is published, and where the evidence is thin or negative we say so.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. This article is general information, not veterinary advice. If your cat is unwell, contact your veterinarian.
