 [ Symptoms ] i was having dark and thickened spots in my finger skin for few months now it is started to crackle [ Disease ] darn cracking skin on only the hands and finger joints can be caused simply by contact allergies or due to some habits like smoking or working a hard work job by using too little moisturizer or by frequent hand washing however continued cracking deep fissures bleeding or no improvement with extra moisturizing may signify a more serious skin condition usually a type of eczema i recommend you would see a dermatologist if using moisturizers and over the counter steriod creams fails