Skin thickening and cracks on the outer side of my fingers on the nodes and on the inside swelling and hardening with some pus sack inside?

Finger cracks: If your hands are often exposed to various liquids, cleaning products,etc this could be the cause and wearing rubber gloves would be advisable. Excessive dryness of the skin is another possibility and using moisturizing balms or lotions as needed should help. A dermatological problem or a condition like scleroderma would require an examination by a physician or dermatologist.