Soreness and pain in the calf muscles are alert to varicose veins in the lower limbs, lumbar disc herniation, sports injuries and other diseases. 1. Lower extremity varicose veins: this condition refers to a disease caused by the obstacle of blood supply to superficial veins of the lower extremities, which is usually related to the structural abnormality of the vein wall, venous hypertension and other factors, with the clinical manifestations of soreness and swelling of the legs as well as leg ulcers, hemorrhage, superficial phlebitis and other varicose vein complications. 2. Lumbar intervertebral disc herniation: the degeneration of lumbar intervertebral discs and partial or total rupture of the annulus fibrosus may lead to the protrusion of the nucleus pulposus, which may cause compression or irritation to the nerve root and cauda equina, resulting in lumbar pain, numbness of the lower limbs, sciatica, cauda equina syndrome and other symptoms. 3. Sports injury: this condition is common in frequent strenuous physical activities, which will cause small tears and bleeding in the leg muscles, resulting in soreness, pain and other symptoms in the joints and muscles. If the above conditions are present, it is recommended to consult a doctor for diagnosis and further treatment.