A deflated thumb may be due to micronutrient deficiencies, skin erosion, eczema of the finger skin, etc. Thumb belly deflated may be the lack of some trace elements, vitamins or anemia and other reasons. Like this situation, we must pay attention to nutritional supplements, such as eating more dark green vegetables, eat some animal organs, etc., can improve the thumb flat situation to some extent. May also be related to skin corrosion, mostly seen in a long time to wash clothes or contact with toiletries, such as soap, hand sanitizer, this is a temporary phenomenon. This is a temporary phenomenon that most people experience, and will slowly return after a few hours. Sometimes a long time in the water, can also lead to the fingers of the finger belly deflated, out of the water, will soon be restored. Some finger skin eczema, can be manifested as the surface peeling, finger belly deflated, you can go to the dermatology department. Patients should pay attention to the finger skin protection, avoid contact with physical, chemical stimuli. Appearance of the finger belly shriveled, can be used to moisturize the topical ointment, such as petroleum jelly ointment, etc.. Drugs should be applied under the guidance of a doctor.