Cat belly hair loss, also known as psychogenic alopecia, is a condition that causes cats to lose hair on their belly and flanks. It is a common problem, especially in young cats, and can be caused by a variety of factors, including stress, anxiety, and allergies.
Psychogenic alopecia is not typically a serious medical condition, but it can be uncomfortable for cats and can lead to skin irritation and infection. If you are concerned about your cat's hair loss, it is important to take them to the vet to rule out any other medical conditions.