The growth of pouches around the nipples may be physiological or pathological, and the specific analysis is as follows: 1. Montserrat nodules. It is a normal physiological structure that protrudes under cold stimulation and behaves like goose bumps. It closes in daily life and opens during pregnancy and lactation. 2. Nipple allergy. Exposure to allergic substances. Resulting in papules, pain and itching on the nipples, need to find out the allergen and actively take antihistamines, do not scratch with your hands. 3, nipple eczema. Inflammation of nipples caused by internal and external factors, which may include nipple itching, erosion and overflow, need to keep nipples clean and dry, and apply glucocorticoid ointment. 4. Breast cancer. Patients with cancer may have pain, papules, overflow and erosion on the nipples, which are actively treated by surgery and regularly reviewed after surgery to prevent recurrence.