Breast pain before it rains may be caused by breast hyperplasia and hormonal disorders. 1. Breast Hyperplasia: Breast Hyperplasia is a condition in which there are symptoms such as pain, lumps and bumps in the mammary glands due to Liver-Qi stagnation (poor Qi and blood transportation in the liver and emotional depression). When it rains, the weather is humid, there is less exercise, the temperature is lower, and the body is in a cold state, causing the skin of the breast to contract in the cold, which can lead to increased pain in the breast. 2. Hormone disorders: Emotional instability caused by the weather and fluctuations in hormone levels in the body lead to an imbalance in the secretion of estrogen. Hormone disorders can damage the mammary glands and cause pain in the mammary glands. In this case, the duration is short, and generally good care can be self-recovery. If the symptoms are more serious, it is recommended to go to the hospital for consultation and examination to avoid delaying the condition and causing unnecessary harm to the body.