If a woman has pain in her left inner thigh, it may be caused by the following reasons: 1, this situation may be caused by muscle strain here, for example, some women do substantial activities involving the hip, such as dance exercise, may cause the left thigh muscle strain, and then cause pain. 2, it may be caused by deep vein thrombosis, some women often like to sit and stand for a long time, and cross-legged, this may cause the left femoral vein to be squeezed for a long time, and then produce deep vein thrombosis. The left side of the femoral vein may be squeezed for a long time, resulting in deep vein thrombosis, which may cause pain in the inner thigh and swelling of the whole thigh. 3, may also be caused by left femoral head necrosis, some women may be due to left hip trauma or alcoholism and other factors, and then the left femoral head necrosis, which can also be manifested as the above-mentioned pain. Some women may suffer from left femoral head necrosis due to trauma to the left side of the hip or alcoholism.