A lot of small blisters on the index finger is very itchy, may be related to the blister ringworm, eczema and other causes, usually according to the cause of the use of drugs for treatment, such as antifungal topical ointment, antihistamine drugs and antibiotics. 1. Blister ringworm: blister ringworm can appear in the fingers or palm area of the small blisters of the size of a pinhead to rice grains, and accompanied by obvious itching. Therefore, this kind of patient is going to appear on the index finger grows a lot of small blisters, very itchy situation. Generally, anti-fungal topical ointment can be given for treatment, such as terbinafine cream, bifonazole cream and so on. Those who are allergic to the above medications are prohibited from using them. 2. Eczema: If the patient’s hands are in contact with detergents, chemicals, etc., eczema may be induced, resulting in a lot of small blisters on the index finger, very itchy situation. Patients can usually take oral antihistamine drugs for treatment, such as cetirizine, loratadine, etc.; if also accompanied by bacterial infection, should also take oral antibiotics such as roxithromycin, amoxicillin. If you are allergic to any of the components of the above drugs, you are prohibited from using the drug. There are many small blisters on the index finger itchy and other reasons, it is recommended to go to the hospital in a timely manner to find out the cause of the disease, standardized treatment, drugs need to be used in accordance with the doctor’s instructions, so as not to delay the condition.