Nipple cover loss is a phenomenon that requires concern because it may involve women's health and lactation function. The following are possible causes of nipple cap loss:

1. **Congenital factors**: The nipple structure of some women is inherently fragile. There may be congenital dysplasia of the nipple cover, which is easy to fall off under the influence of external forces.

2. **Breastfeeding habits**: During the breastfeeding process, due to the baby's excessive sucking force or incorrect breastfeeding posture, long-term pressure is placed on the nipple, which may cause the nipple to be damaged and fall off.

3. **Improper use of breast care products**: If certain breast care products are used improperly, such as being too irritating or having chemical ingredients that damage the nipple skin, they may also cause the nipple cover to fall off.

4. **Trauma or infection**: Trauma or infection of the nipple, such as mastitis, may affect the health of the nipple, and in severe cases may cause the nipple cover to fall off.

5. **Changes in Hormone Levels**: Changes in hormone levels may also affect nipple health. For example, during the menstrual cycle or pregnancy, nipples may become more sensitive and fragile due to fluctuating hormone levels.

6. **Age factor**: As we age, the skin in various parts of the body will gradually lose elasticity. Nipple skin is no exception. The nipples of middle-aged and elderly women may be more susceptible to damage and loss due to loose skin.

7. **Other health problems**: Some systemic health problems, such as autoimmune diseases or vascular diseases, may also cause nipple caps to fall off. Because these diseases may affect the blood circulation and nutritional supply of the nipple.

If the nipple cover falls off, it is recommended to seek medical treatment in time. The doctor can analyze the specific situation and provide corresponding suggestions and treatment plans. In addition, maintaining good breastfeeding habits, using breast care products correctly, avoiding trauma, and keeping breasts clean are also important measures to prevent nipple cover from falling off.

In summary, nipple cover loss can be caused by a variety of reasons. Understanding these causes and taking appropriate precautions can help protect the health of your nipples. If you have any doubts or find any abnormalities, please seek medical consultation in time.