Finger belly smooth, clinically possible causes are fungal infection, exfoliative keratolysis, contact abrasion and so on. 1. Fungal infection: clinically also known as ringworm, it is the dermatophyte infection of the skin of the hand and the disease, usually in direct contact with or with the sick people sharing items and other infections, clinical manifestations of the palm and fingers hyperkeratotic lesions, accompanied by dandruff, blisters, dryness, itching, etc., part of the sick population of the finger belly in the peeling became smooth, fingerprints may also disappear. 2. Exfoliative keratolysis: this condition refers to the palm and plantar cuticle exfoliative dermatosis, which is usually associated with emotional, sweaty, genetic and other factors, the clinical manifestations of the palm of the hand for the recurrence of scaling, peeling, etc., accompanied by local dryness and discomfort, sweating and so on. 3. Contact wear and tear: part of the population often wash clothes, repeated hand washing, labor friction, etc., may cause the finger belly peeling or epidermal abrasion, and thus touching the finger belly will feel smoother, which is a normal physiological changes. If the disease factors caused by the relevant situation, it is recommended to go to the hospital and receive treatment.