Years ago, my best friend would go to the pharmacist for "Magic Butt Paste" for her grandmother. It immediately made her bed sores and lesions better and in later years, we used it on our kids for diaper rash. I have used it on myself many times to cure deep cracks and sore spots.
The pharmacist didn't require a prescription, it's just something that they make up behind the counter. He said that just about any pharmacist will make it up for you but I found three recipes for it online, one is for mild issues and one is for severe issues.
Believe it or not, the mild-care recipe is Malox and Aquaphor mixed together...I would assume 50/50?
The severe form is 1 Tube Neosporin, 1 Tube Destin, 1 Tube 1% Hydrocortisone cream and one tube of yeast infection cream.
A pediatrician gave this recipe:
2 oz A & D ointment
2 oz zinc oxide ointment
1 oz Maalox or Mylanta
1 oz bacitracin
That seems more like what we used to use, apparently the antacid is what helps with the pain.
I know it sounds weird, but this stuff would clear diaper rash in a few hours and gets rid of bed sores and cracks overnight.