Small meatballs at the base of the thighs are usually soft fibrous skin tumors, also called dermatofibromas, which are benign skin tumors, mainly occurring in middle-aged and old-aged patients, but also in peri-menopausal women or women during pregnancy. It mainly occurs in the folded parts, such as neck, armpit, thigh root and so on, and has no great influence on the health. However, they may gradually increase in size as time goes by. Some soft skin fibromas may become inflamed, red, swollen and painful due to friction and extrusion. In this case, you can go to the dermatology department of the hospital to do laser treatment or electrocautery treatment, from the root of the treatment to remove the general will not recur, and within one week after the operation, pay attention to do not get wet, can be sterilized with iodine povidone or apply mupirocin ointment to reduce inflammation.