There is no specific skin treatment that I know of to toughen penile skin. I advise regular moisturizing with Aquaphor ointment, perhaps a hiatus from sex for a couple of weeks, followed by lubrication before any future sex. You can consult a urologist, but I doubt that surgical options are available. Still, you may want to look into this if all else fails.
Best.
Dr. Rockoff
I suffer from this same problem- cracking of the skin between the penis and shaft. I have tried to use OTC lotions to no success. I feel that it is thin and cracks during sex. My dermatologist says he has seen this a few times and is not sure what it is but has treated it with 1% hydrocortisone and iodoquinol 1%.
I just got on this medication yesterday and can't speak to the results. Any thoughts on this medication correcting this problem or possibly causing others?