Feeling a hard lump in the calf belly still hurts, may be due to subcutaneous tissue infection, lipoma, fibrosarcoma and other diseases. 1. subcutaneous tissue infection: subcutaneous tissue infection will cause redness, itching, swelling and other symptoms, some patients will appear in the infected area of the case of lumps. Subcutaneous tissue infection occurs in the calf, will cause the patient calf belly feel a hard lump pain. 2. Lipoma: Lipoma can occur in any part of the body where fat exists, commonly found in the trunk and limbs, this disease will cause multiple or single lumps in the affected area, and pain will occur during the active growth period of lipoma. 3. Fibrosarcoma: fibrosarcoma is a kind of malignant tumor, this kind of disease in the early stage, the symptoms are not obvious, with the development of the disease, it will cause local lump pain and other symptoms. If you feel a hard lump in your calf belly and still have pain, it may also be due to varicose veins of the saphenous vein and muscle damage.