There are many causes of thigh cramp pain, mostly due to muscle contraction and spasm, patients often have severe pain, generally this pain does not last long, can be self-recovery. Common causes are the following: 1, calcium deficiency: patients with this kind of thigh cramp pain may also be due to calcium deficiency, patients often suddenly appear convulsions and leg pain, generally supplemented with sufficient sources of calcium can be relieved; 2, muscle strain: if the patient appears like a cramp pain, and the pain time is very long, consider the muscle strain caused by, in addition to patients There will also be local swelling and cramping. For this condition, the symptoms are generally not relieved after rest, it is recommended to choose the blood circulation drugs for treatment; 3, long standing: the inner thigh cramps pain, consider may be due to the patient long time standing and maintain the same posture, thus causing the emergence of local muscle tension strain phenomenon, resulting in patients with thigh cramps pain; 4, excessive exercise: excessive thigh muscles in the Overload state, local lactic acid accumulation, can cause thigh cramps pain and other symptoms; 5, cold: night sleep wind and cold may also lead to thigh cramps pain, it is recommended that patients usually pay more attention to keep warm. In addition, if the patient has a spinal cord or intracranial tumor, compression of the nerve that controls the thigh muscle, can also occur thigh cramps, or thigh numbness and other symptoms, it is recommended to promptly seek medical care for CT examination, etc., to clarify the lesion, targeted treatment. It is important to note that women during pregnancy are also prone to thigh cramps, especially at night, and most of them can be relieved by themselves. It is recommended that pregnant women pay attention to calcium supplementation, proper exercise, rest, and massage for relief of thigh cramps.