The main operation steps of photodynamic treatment of acromegaly include dressing and illumination. 1. Dressing: medical personnel according to the drug site and area of the fresh configuration of the liquid, the liquid will be covered in the skin lesion parts of 3 to 4 hours, requires complete coverage of the skin lesion and the edge of the skin lesion 1cm range, and according to the specific circumstances of the seal package fixed, to avoid the flow of liquid. 2. Illumination: after the end of the liquid external application, the patient empties the urine, set up the position, the operator wears goggles to choose a specific wavelength light illumination of the affected area, irradiation time is usually 20 minutes for each spot, the basic completion of the treatment process. After the light can be localized cold compresses to reduce swelling and pain. Photodynamic therapy is usually done once every 1-2 weeks, 3-4 times are recommended for a course of treatment in first-episode cases, and 4-6 times are recommended for a course of treatment in recurrent or persistent cases. During the treatment, the treatment area should be kept clean and dry, if there are special conditions such as erosion and oozing, you need to consult a doctor in time and follow the doctor’s instructions.