What causes a sudden outbreak of small blisters in the ear that are extremely itchy?

Generally, if a cluster of small blisters suddenly appears on the ear accompanied by intense itching, it may be caused by factors such as eczema, contact dermatitis, or herpes zoster. Specific analyses are as follows:

1. Eczema

Eczema may cause severe itching, ulceration, and blister formation on the skin of the earlobe. Patients can follow medical advice to use Kangfuxin Liquid: soak 6–8 layers of sterile gauze with the solution and apply it cold to the affected area for 20 minutes each time, twice daily. Additionally, topical medications such as fusidic acid sodium ointment or nitrofurazone cream may be applied as part of treatment.

2. Contact Dermatitis

Contact dermatitis can lead to skin lesions on the local ear area, including erythema, papules, or blisters. Patients may follow medical guidance to apply corticosteroid creams such as mometasone furoate cream, halometasone cream, or fluticasone propionate cream.

3. Herpes Zoster

Herpes zoster is caused by infection with the varicella-zoster virus and may result in small, intensely itchy blisters on the ear. It is recommended that patients follow medical advice to use antiviral medications such as acyclovir cream or compound neomycin ointment.

In addition to the above three causes, similar symptoms may also be related to allergies, diffuse external otitis, or fungal external otitis. Early medical consultation and diagnosis are advised to help relieve discomfort promptly.