Why is my cat constantly scratching its tail base, no fleas?
Even though you don't see any fleas, your cat could still be having an allergic reaction to fleas. It only takes the bite of one flea to set off the reaction, and itchiness over the base of the tail is classic flea allergic dermatitis. However, dermatitis can be brought on by other skin parasites (mosquitoes, mites, lice), bacterial and fungal skin infections, nutritional imbalances, hormonal imbalances, and autoimmune disorders. Therefore, I recommend that you have your cat examined by your veterinarian for a full clinical work up.
Updated on September 23rd, 2025