Dandruff is a sign of dry skin in cats, but turning on a humidifier may be more effective than shampooing a feline, states PetMD. A humidifier and a nutritious diet can help fix a cat's flakes from the source.
A dip with peppermint and rosemary essential oils can also be helpful, especially if a cat is itchy. PetMD.com suggests a tea bath with aloe and catnip to soothe dry skin. A veterinarian can also prescribe special shampoos or supplements with omega-3 fatty acids to help with the dryness.
Dry skin in cats can be seasonal or the indicator of a nutritional or another underlying problem, notes Pets.WebMD.