I have numbness in both my feet- the two toes next to the big toe. They have some kind of fungus in them causing nails to be thick and dark in Color. They also are cracked. Looks like they grow a second nail sometimes. The outer sides of my feet and heals our cracked. The bottoms get that way too sometimes but not as bad. I have tried sanding them down. Putting a&ad salve on them. I wear Band-Aids on them when I go outside. I normally don't wear shoes or socks. The lint from the socks gets caught in my cracks and it hurts. I have to cut off the extra thick skin around the cracks so it will help heal. Or they get snagged on the rugs or socks. I have a footbath to soak my feet in. It doesn't work that much so I don't use it very often. I have had this problem since I don't know when maybe 30 years it's just been getting worse the past 15 years or so. I am 50 years old now. The rest of my skin all over my body is normal. Please help with advice. Thank you.