Significant weight loss may lead to excessive skin in areas such as the neck, abdomen, arms, and thighs. For some patients the excessive skin may cause problems with skin irritation and rashes. For others it may be bothersome from a cosmetic perspective.  A plastic surgeon will be able to determine the type of procedure that is needed and if there is medical necessity.  It is recommended that you wait until you have lost most of your weight before considering plastic surgery. Insurance companies generally do not pay for this type of procedure.