The common reasons for the symptoms of low back pain when it rains are as follows: 1. The patient must have a lumbar disorder, which is aggravated by various factors when it rains, resulting in painful symptoms. When it rains, the temperature will become lower, which will affect the blood circulation of the waist, making the blood circulation of the waist worse and aggravating the basic disorders, resulting in low back pain. 2. Although the impact is very slight, but also on the local circulation will have a corresponding mild impact, so that the basic disease will also appear to aggravate the situation, manifested as the symptoms of pain.