Localized lipodystrophies are defined as a localized loss of subcutaneous fat from small areas or from parts of a limb. There may be single or multiple lesions. It is characterized by depressed areas corresponding to the loss of subcutaneous fat. In some cases, it may be associated with tender, painful nodules in the skin. Usually, it occurs in diabetic patients at the site of insulin injections. In some patients, at loss occurs from areas where pressure is applied frequently. For example, pressing thigh against a make-up table. Many others develop these due to as yet unknown mechanisms.