My second problem is dry cracked heels; can you help me?

Moisturize: Try applying moisturizer i.E thin layer of vaseline. If you can toerate apply, place Saran wrap over your feet, socks and go to sleep at night. If there is rough skin, you can try smoothing with a pumice stone.

Yes: Use a good moisturizing lotion daily and usea pumice stone to remove the dead skin.

Creams and ointments: Try using creams and ointments with urea in them. This will soften and moisturize.