Hard lumps in subcutaneous tissue may be subcutaneous lipoma, subcutaneous cyst and subcutaneous fibroma. 1. Lipoma: it is a kind of benign tumor, which can be diagnosed by ultrasound. When the lipoma is small and has no obvious symptom, regular review can be done, and when the lipoma is large, which affects the aesthetics and local pain symptoms, surgical resection can be considered. 2. Subcutaneous fibroma: the etiology is not clear, with genetic factors, lipid metabolism, etc., is a kind of benign tumor, usually do not need treatment, affecting the function of the body, you can consider surgical resection, after surgery, send pathology examination to clarify the nature of the tumor. 3. Subcutaneous fibroma: it is also a kind of benign tumor, no treatment is needed when there is no symptom, regular review can be done, when the tumor is found to be bigger, surgical resection can be considered. Subcutaneous hard lumps are also seen in other reasons, need to go to the hospital in a timely manner, improve the examination, clear diagnosis, so as not to delay the condition.