Currently, both of my thumbs have deep cracks at the corners of my nails along the top towards my thumbprint, and it is a very hard spot to put a bandaid on. I also have them on my heels (one is 1/2" long) They started to crack when the weather got colder and dryer. I have tried lotions and oinments to heal them, but with little success. I work with my hands alot, so when they crack, they really throb and bleed alot. Has anyone out there experienced this, and what can I do heal my hands?