Lumps in the thighs may be caused by subcutaneous lipoma, enlarged lymph nodes, superficial varicose veins and so on. 1. Subcutaneous lipoma: Subcutaneous lipoma is usually caused by improper diet, excessive obesity, heredity, metabolic diseases, etc. When chronic inflammation in the body stimulates the lipoma factor, it may lead to the proliferation of normal cells, which will lead to the deposition of adipose tissues, thus forming the subcutaneous lipoma, so the lumps in the thighs may be caused by subcutaneous lipoma. 2. Enlarged lymph nodes: enlarged lymph nodes are usually due to the reactive enlargement of peripheral lymph nodes in the body caused by bacterial and viral infections, and it is recommended that the patient should not walk excessively during the period of recovery, so as not to cause the swelling of the lower limbs, which will lead to the aggravation of the condition. 3. Superficial varicose veins: Superficial varicose veins are usually caused by venous hypertension, decreased pumping ability of calf muscles, etc. It is recommended that the patient should consult a doctor in time and do the treatment according to the condition. It is recommended that the patient should pay attention to the warmth of the legs during the recovery process, avoiding the aggravation of the condition caused by pressure and cold, and consult the doctor promptly if there is any discomfort.