Hard lumps on inner thighs can be seen in lipoma, sebaceous cysts, lymph nodes, etc., which can be consulted in dermatology, general surgery and oncology. 1. Lipoma is a common benign soft tissue tumor, which can be seen as single or multiple subcutaneous limited lumps, and it is common in the trunk and limbs under the surface skin, which can be diagnosed in general surgery and surgically excised at the beginning. 2. Sebaceous cysts are cysts formed by the gradual accumulation of sebum, often found on the head, face, back and buttocks, etc., with medium hardness or elasticity, and can be referred to dermatology or general surgery. 3. When lymph node inflammation or lymph node cancer occurs, hard lumps can be detected in the inner thighs, which should be consulted in oncology. If there are hard lumps on the inner side of thighs, you should consult a doctor in time, complete the superficial ultrasound and other examinations to clarify the cause of the disease and treat the symptoms.