The common causes of frequent leg pain are lumbar disc herniation, lack of exercise or excessive exercise, osteoarthritis and calcium deficiency. 1. Herniated lumbar intervertebral discs: Herniated lumbar intervertebral discs lead to compression of nerves, which can lead to lower extremity pain and numbness and other symptoms. 2. Lack of exercise or excessive exercise: lack of exercise will lead to muscle atrophy, lower limb muscle strength decline, leg soreness, leg weakness and other symptoms, and excessive exercise will lead to muscle fiber damage and produce a large amount of lactic acid, triggering lower limb soreness. 3. Osteoarthritis: such as degenerative changes in the knee joints of middle-aged and elderly people, there will also be lower limb pain, activity difficulties and other symptoms. 4. Calcium deficiency: prolonged insufficient calcium intake or low calcium caused by hypothyroidism and other diseases can also trigger symptoms such as sore legs and cramps. The causes of frequent leg pain are many, and may also be related to diabetes, gout and other diseases, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner, to clarify the cause of the disease, and to carry out targeted treatment.