Itchy fingertips may be caused by physiological factors such as skin dehydration, or it may be caused by ringworm, herpes, scabies and other diseases. 1. Physiological factors: insufficient daily water intake, skin dehydration and other physiological factors may trigger dry, itchy skin, some people will have itchy fingertips. 2. Ringworm: generally manifested as hand hyperkeratosis, flaking, blisters and dryness and other symptoms, mostly accompanied by itchy skin. The cause may be due to pathogenic bacterial infection, tinea pedis, excessive sweating and other factors may also trigger the disease. 3. Sweat herpes: mainly manifested as intensely itchy blisters, mostly on the hands and feet. The cause of its formation and local allergies, ringworm infection and mental factors. 4. Scabies: mainly manifested as papules, blisters and intense itching, commonly found on the hands, elbows and other places. Scabies is mostly due to the human scabies mite infesting the skin. The causes of itchy fingertips are more, after excluding physiological factors, it is recommended that patients seek medical examination to clarify the cause of the disease.