The inner thigh is particularly sore, the possible causes are muscle strain, soft tissue strain, hip synovitis, lumbar disc herniation and so on. 1. Muscle strain: it may be due to the human body involved in the movement of the tissue structure, such as the inner thigh muscles, ligaments, fascia, etc., carried out too much activity, or the muscles for a long time in a state of tension and damage, showing the symptoms of soreness. 2. Soft tissue strains: prolonged strenuous exercise or prolonged workout may lead to soft tissue strains such as inner thigh muscles, triggering damage to muscle fibers and symptoms of soreness. 3. Hip synovitis: If there is no trauma, the synovitis of the hip joint may be triggered by prolonged repetition of a certain kind of movement or maintaining a posture; the inner thighs may also be particularly sore. 4. Herniated lumbar disc: For patients with herniated lumbar disc, the herniated disc may press the peripheral nerve root backward, such as the nerve root of the inner thigh is compressed, and the symptoms of inner thigh special pain will appear. There may also be other reasons for the inner thigh pain, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.