I Am A 40 Year Old Male. I Am Somewhat

I am a 40 year old male. I am somewhat overweight and as a result my penis is covered by skin most of the time. I've never had a problem from this till about 2 months ago. I have redness around the head and split skin around the top part of the shaft. The split skin is around the area exposed when the skin covers the head. I am circumcised. It is extremely painful and hard to pull my penis out. I've never had this problem before. I recently had back surgery and I started very soon after the surgery. I also am diabetic.