The long and dense small blisters on the legs may be caused by herpetic tinea pedis, may also be caused by eczema, and may be caused by herpes zoster, the cause is different, the treatment method is also different. 1. blistering tinea pedis: blistering tinea pedis is a skin fungal infection caused by the disease, the disease can lead to patients appearing on the leg long dense small blisters symptoms, treatment can be applied locally clotrimazole ointment, terbinafine ointment for treatment, but also oral itraconazole and other drugs for treatment. 2. eczema: eczema can also lead to the symptoms of patients with dense small blisters on the legs, the treatment should avoid spicy and stimulating food, you can use boric acid solution, ezacrine solution, etc. for wet compresses, but also the use of dexamethasone cream, zinc oxide paste, and other medications coated with the affected area. 3. Herpes zoster: Herpes zoster is a disease caused by the reactivation of the varicella zoster virus latent in the human body, which can also lead to symptoms of dense small blisters on the legs, the treatment can use acyclovir, vasiclovir and other medications, but also the use of methylcobalamin, dexamethasone, ibuprofen, tramadol, and other medications to assist in the treatment. In addition to the above diseases, other causes can also lead to the symptoms of dense small blisters on the legs, it is recommended to consult a doctor in a timely manner, and follow the doctor’s instructions for treatment.