Subcutaneous hard lumps that are painless and itchy can be caused by lymph nodes, epidermoid cysts, sebaceous cysts, lipomas, and so on. 1. Lymph nodes: physiologic lymph nodes will not be touched, and there will be no symptoms of hard lumps under the skin without pain or itching. When there is inflammation or tumor in the lymph nodes of the neck, armpit, groin, etc., subcutaneous hard lumps without pain or itching may also appear. 2. Epidermoid cysts: cystic structures formed when the basal cells of the epidermis enter and grow under the skin as a result of trauma. They are often found in areas that are easily rubbed, such as the elbows and buttocks. 3. Sebaceous cysts: cystic tumors formed when sebaceous gland ducts are blocked and sebaceous gland excretion is obstructed. It may also lead to hard lumps under the skin without pain or itching. 4. Lipoma or fibroma: benign tumors formed by abnormal proliferation and differentiation of subcutaneous fat tissue and fibrous tissue, which can also cause painless and itchy symptoms of subcutaneous lumps. Subcutaneous hard lumps are painless and itchy, there may be other reasons, you need to go to the hospital for examination, to clarify the cause of the disease and follow the doctor’s instructions for treatment.