A small raised transparent bump on the little finger can be considered as herpes sweat, herpes simplex or hand, foot and mouth disease and other diseases. 1. Sweat herpes: belongs to the special type of hand eczema, can appear in the lateral edge of the finger or the palm and toes in the corn size deep in the blisters, the inner may contain clear pulp, with varying degrees of itching and burning sensation. 2. Herpes simplex: it is caused by herpes simplex virus, and there may be aggregated blisters with thinner walls than herpes sweat. 3. Hand, foot and mouth disease: characterized by blisters on the hands, feet and oral cavity, occurring on the hands, the lesions are initially a red rash, which can develop into blisters with thin walls and clear blisters, and ulcers will be formed after breakage. Transparent pimples appear on the hands of more reasons, it is recommended that timely medical treatment, so as not to delay the condition.