It is a reaction similar to exposure to the sun. It may develop in your case and it is considered normal. It can be expected to occur toward the end of, or shortly after treatment. Normally, this reaction will improve gradually when treatment is completed. Discuss with nurse or physician.
Creams are available.
Report any skin changes as they occur to your therapist or the nurse. Wear loose fitting clothes that will not rub the area. Do not wash off treatment marks.