There are more than just four diseases that cause calf soreness. Common diseases include varicose veins of the lower extremities, fasciitis of the lower extremities, arthritis, and lumbar intervertebral disc herniation. 1. Varicose veins of the lower limbs: with the aggravation of superficial varicose veins of the lower limbs, most of the patients will have the symptom of heavy and painful discomfort in the lower limbs, so the soreness and distension of the calves should be alert to the possibility of varicose veins of the lower limbs. 2. Fasciitis of the lower limbs: mainly manifested as lower limb pain, muscle tension or spasm and other symptoms, so the calf soreness should be alert to the possibility of fasciitis of the lower limbs. 3. Arthritis: arthritis is a general term for various types of inflammatory diseases of the joints, which generally leads to joint pain, swelling, stiffness, limited mobility and other symptoms, so calf soreness should be alert to the possibility of arthritis. 4. Lumbar disc herniation: may be due to lumbar disc herniation compression to the nerves innervating the calf, generally manifested as calf muscle pain, numbness and other symptoms, so calf soreness and swelling to be vigilant, may be lumbar disc herniation. There are many other causes of calf soreness, therefore, if the patient has symptoms of calf soreness, it is recommended to consult a doctor in a timely manner to identify the cause of the disease and actively treat it.