The forehead lump may be subcutaneous fat nodule, also called subcutaneous lipoma clinically, which belongs to benign hyperplasia. Generally, people suffering from this disease often have no obvious pain, mainly manifested as subcutaneous fat connective tissue hyperplasia. However, with the enlargement of fatty nodules or obvious capsule around them, symptoms of oppression and pain usually appear, and timely treatment is needed at this time, so surgery is generally chosen. In addition, a lump on the forehead may also be a malignant connective tissue hyperplasia or a seizure of peripheral radiculitis.