Okay this sounds weird... part of the problem with this type of thing is they don't heal well. The skin becomes hard at the edges of the split and pressure to the area maintains the open wound. It's the same premise as a knife cut. As long as his hand isn't full of them ( one or two is okay ) then I usually take a clean (sterilize them if you have to - his immune system is compromised - you don't want an infection ) nail clipper or cuticle scissors and cut away the hardened ends. this exposes new softer tissue and brings the wound closer to the surface. Then put a little polysporin into the wound, and wrap with a bandage in a day or two it will heal from the inside out. Works like a charm!!! seriously. He could also use maybe a paraffin hand dipping too. It locks in moisture.

Bedsores are brutal. The cause of which is lack of mobility, and pressure points. He needs to move more in bed and not sit so much in one position. If he is laying down - maybe a gel pack to the areas most effected, but he's mobile so he really is the master of his own destiny here.

His problem it seems is wound healing overall. He is a big man, but I gather (since he has been sick) he's lost a lot of weight, and is not nearly as active.

Diet plays a big role in wound healing - he needs a lot of protein at this point and calories. If he is on a tube which I believe you said he is. Try adding protein powder to each feed, and mix it in with some water (it has to be thin and smooth - NO LUMPS). This will increase his overall health help with wound healing and circulation as he will have more iron/protein in his blood and therefore more for the O2 to attach to.

The other problem of course is O2 - circulation which come with diet as stated above - and movement. Even if he is sitting in a chair - leg lifts, arm lifts will help. Challenge him.

hugs...