Pain belongs in the middle of the workup, not the end, because cats often hide limping while still responding to discomfort. Arthritis, spinal pain, dental pain, and urinary discomfort can all shift grooming into a repetitive coping behavior. Unlike itch, pain-linked grooming may not respond to parasite control or diet changes, and it may cluster around the belly, flanks, or a single limb. This is a key reason cat overgrooming causes should never be reduced to “anxiety” without a body check.
At home, look for small tells: reduced grooming elsewhere (a painful cat may look unkempt except for the overgroomed spot), irritability when brushed, or sudden avoidance of being held. Track litter box behavior—frequent trips, straining, or vocalizing—because bladder pain can drive belly licking. Owners can also note whether the cat’s licking increases after play or after a long nap, when joints are stiff. These details help the veterinarian decide whether a pain trial, urine testing, or imaging is the next best step.