Clinically, the appearance of back pain in the 5th month of pregnancy is mainly related to the endocrine changes during the special period, while recent exertion, cold and strenuous exercise can also lead to back pain. For the treatment of this condition, the main consideration is that drugs cannot or should not be taken during pregnancy, so the main treatment option is to take physical therapy. Pay attention to rest, reduce activities and weight bearing, avoid overwork, prolonged standing, prolonged squatting, prolonged sitting and bending, avoid local cold rush, avoid strenuous exercise, you can give local hot compresses, but it is better not to carry out microwave therapy or baking electricity. You can properly carry out functional exercises for the muscles of the low back, such as sit-ups to relieve symptoms and promote recovery. This situation is mainly considered to be related to local myofasciitis or muscle strain, the special period of endocrine changes are also related to a certain extent, as long as they usually pay more attention to the symptoms can be relieved.