Cats suffering from mammary gland hyperplasia will lick the breasts due to pain, causing skin ulceration and worsening the condition. The cat's mammary glands will become swollen quickly, and the cat will also be very uncomfortable, with lumps on or near the nipples. If the cat's mammary gland hyperplasia occurs after giving birth, it will often make it difficult for the female cat to discharge milk, and may also lead to poor mental health and increased body temperature. Therefore, once discovered, the cat must be treated in time.