What's the matter with blisters on foreskin?

Blisters on the foreskin may be caused by genital herpes, balanitis, allergic reactions, contact dermatitis, friction irritation, etc., and can be relieved by antiviral treatment, anti-infective treatment, anti-allergic treatment, local care, surgical treatment, etc. It is recommended to seek medical treatment promptly for a clear diagnosis and avoid aggravating the condition by self-treatment.

1. Genital herpes

Genital herpes is mainly caused by herpes simplex virus type 2 infection and manifests as clusters of small blisters on the foreskin or glans, accompanied by burning or itching. The virus can be spread through sexual contact and has an incubation period of 2-12 days. Confirmation requires viral DNA testing. Antiviral drugs such as acyclovir cream, famciclovir tablets, and penciclovir cream can be used for treatment. At the same time, the affected area needs to be kept clean and dry. Those with recurrent attacks require long-term suppressive treatment.

2. Balanitis

Balanitis is mostly caused by bacterial or fungal infection. Common pathogenic bacteria are Candida albicans and Staphylococcus aureus. It manifests as redness, swelling, blisters or erosion of the foreskin, which may be accompanied by white discharge. People with diabetes are more likely to develop it. Treatment requires choosing antifungal drugs such as clotrimazole cream, miconazole nitrate cream, or antibiotics such as mupirocin ointment according to the pathogen. People with excessive foreskin are prone to recurrence. It is recommended to perform circumcision after the inflammation is controlled.

3. Allergic reaction

Contact with condoms, detergents or medications may trigger allergic dermatitis, which causes itchy blisters on the foreskin. Common allergens include latex, fragrances, preservatives, etc. It manifests as erythema and blisters with clear borders. Symptoms can be relieved after being out of contact. Treatment requires immediate discontinuation of allergenic products, topical application of hydrocortisone butyrate cream, and oral administration of antihistamines such as loratadine tablets. In severe cases, dexamethasone injection is required.

4. Contact dermatitis

Contact with irritating chemicals such as soaps and disinfectants may cause chemical dermatitis, which manifests as redness, swelling and blisters at the contact area. Unlike anaphylaxis, this type occurs upon first exposure. Treatment requires flushing the affected area with normal saline, topical calamine lotion to relieve symptoms and avoid scratching. Fusidic acid cream needs to be used in case of combined infection. Mild cleaning products should be chosen daily to reduce local irritation.

5. Friction stimulation

Vigorous sexual intercourse or friction with clothing may cause mechanical blisters, often at the foreskin frenulum. It manifests as small transparent blisters with no symptoms or mild pain. Generally, no special treatment is required, and it can heal itself by keeping the area clean. Those with recurring symptoms should check whether the foreskin is too long or too tight, and perform foreskinplasty if necessary. Avoid using alkaline shower gels and choose weakly acidic care solutions.

Patients with foreskin blisters should pay attention to perineal hygiene every day, wash it with warm water every day and dry it thoroughly. Avoid wearing tight underwear to reduce friction and choose pure cotton and breathable materials. The diet should be light and spicy foods should be limited. Sexual intercourse is prohibited until a clear diagnosis is made to prevent cross-infection. If combined with fever, swollen lymph nodes or ulcerated blisters, you need to seek medical attention immediately. Elderly people with circumcision are recommended to undergo elective surgery after a doctor’s evaluation to reduce the risk of recurrence. During treatment, strictly follow the doctor's instructions when taking medication, and do not stop medication or change the dosage without authorization.