What causes blisters on the foreskin?

Blisters on the foreskin may be related to factors such as genital herpes, posthitis, allergic reactions, friction injuries, contact dermatitis, etc. It is recommended to seek medical treatment promptly and carry out treatment under the guidance of a doctor after a clear diagnosis.

1. Genital herpes

Genital herpes is a sexually transmitted disease caused by herpes simplex virus infection and is mainly spread through sexual contact. Clusters of small blisters appear on the foreskin, accompanied by pain, itching or burning sensation. The blisters rupture and form ulcers. It may be related to factors such as unsafe sexual behavior and low immunity. Antiviral drugs such as acyclovir cream and penciclovir cream can be used as directed by the doctor, and famciclovir tablets can also be taken orally.

2. Posthitis

Posthitis is inflammation of the lining of the foreskin and glans penis and can be caused by a bacterial or fungal infection. Symptoms include foreskin redness, swelling, itching, and in severe cases, small blisters or ulcers. It may be related to excessive foreskin and poor local hygiene. Antifungal drugs such as clotrimazole cream and miconazole nitrate cream can be used externally, and erythromycin ointment can be used in case of bacterial infection.

3. Allergic reaction

Allergic reactions to substances such as condoms, detergents, medications, etc. may cause a blister-like rash on the foreskin. It is often accompanied by significant itching, and the blisters may merge into sheets. It may be related to personal constitution and exposure to allergens. If you need to avoid contact with allergens, you can use topical hydrocortisone cream to relieve symptoms.

4. Friction damage

Excessive friction or mechanical stimulation may cause skin damage to the foreskin and form small blisters. It is common in sexual life or excessive masturbation, friction with clothing, etc. It manifests as local redness, swelling and blister formation. It is necessary to reduce local irritation and keep it clean and dry. Mupirocin ointment can be used externally to prevent infection.

5. Contact dermatitis

Contact with irritating substances or chemicals may cause contact dermatitis, which manifests as redness, swelling, and blisters on the foreskin. It may be related to the use of new detergents, cosmetics, or topical medications. The main manifestation is a well-circumscribed rash at the contact site. To remove irritants, topical mometasone furoate cream can be used.

Daily care should be taken to keep the perineum clean and dry and avoid scratching the affected area. Wear breathable cotton underwear to reduce local friction. Suspend sexual intercourse until recovery to avoid cross-infection or aggravation of the condition. The diet should be light and avoid spicy and irritating foods. If symptoms persist or worsen, timely follow-up is recommended. Self-medication is not recommended to avoid delaying treatment.