Swollen Foreskin: 9 Possible Causes (& What to Do)

A swollen foreskin usually happens when the foreskin and the head of the penis become irritated, inflamed, or infected. This swelling may appear with redness, pain, itching, discharge, rash, or trouble passing urine.

Swollen foreskin is often linked to balanoposthitis, which is inflammation of both the glans and foreskin. It can also happen with yeast infections, skin reactions, chronic skin conditions, sexually transmitted infections, paraphimosis, drug reactions, trauma, or abscess.

Treatment depends on the cause of the swollen foreskin and may include gentle hygiene, avoiding irritants, antifungal creams, antibiotics, steroid creams, or procedures. Medical care is important when swelling is severe, painful, linked to ulcers or discharge, or when the foreskin is stuck behind the head of the penis.

What causes swollen foreskin?

The main causes of swollen foreskin include:

1. Balanoposthitis

Balanoposthitis is inflammation of the glans, which is the head of the penis, and the foreskin. It is one of the most common reasons for a swollen foreskin, especially in uncircumcised males. The swelling happens because the foreskin becomes irritated and inflamed.

Other symptoms may include redness, pain, itching, tenderness, rash, discharge, and soreness. Some people may also have trouble urinating or notice a weak urine stream. Symptoms can vary depending on whether the cause is infectious, irritant-related, or linked to another skin condition.

What to do: Treatment depends on the cause. Initial care may include gentle cleaning, avoiding irritating products, sitz baths, and keeping the area dry. A doctor may prescribe an antifungal, antibiotic, or steroid cream when a specific cause is suspected.

2. Candidal balanoposthitis

Candidal balanoposthitis is a yeast infection that affects the glans and foreskin. It is a common infectious cause of swollen foreskin, especially in uncircumcised males. It may also be more likely in people with diabetes or after recent antibiotic use.

Symptoms often include bright redness, soreness, itching, and irritation. A rash may also appear, sometimes with small nearby spots known as satellite lesions. The area can feel tender, moist, or uncomfortable.

What to do: Treatment usually involves antifungal medicine, such as clotrimazole or miconazole cream. More severe cases may need oral fluconazole. Any underlying factor, such as diabetes, should also be managed to help prevent recurrence.

3. Irritant or contact balanoposthitis

Irritant or contact balanoposthitis happens when the foreskin reacts to a substance that irritates the skin. Common triggers include soaps, detergents, lubricants, antiseptics, and excessive washing. This reaction can lead to redness, inflammation, and swollen foreskin.

The symptoms are usually milder than with some infections. Burning, itching, tenderness, and mild redness are common. Discharge, ulcers, or severe pain are usually less typical unless another condition is also present.

What to do: Treatment starts by avoiding the trigger. Gentle washing with water only and using an emollient can help protect the skin. A short course of a low-potency steroid cream may be recommended if inflammation does not improve.

4. Lichen sclerosus

Lichen sclerosus is a long-term inflammatory skin condition that can affect the male genital area. It can cause thickening, swelling, scarring, and tightening of the foreskin. Over time, it may lead to phimosis, which means the foreskin becomes hard to pull back.

Other signs can include itching, soreness, white or pale patches, skin splitting, and painful urination. Some people may have narrowing at the urinary opening or dribbling after urinating. The foreskin may look tight, scarred, or less elastic than usual.

What to do: Treatment usually starts with a high-potency steroid cream prescribed by a doctor. Circumcision may be needed when there is repeated scarring, obstruction, or severe phimosis. Follow-up is important because lichen sclerosus has been linked with a higher risk of penile precancerous changes and squamous cell carcinoma.

5. Zoon balanitis

Zoon balanitis is a chronic inflammatory condition that usually affects uncircumcised middle-aged or older men. It can cause swelling of the foreskin along with a shiny, well-defined red patch on the glans or inner foreskin. The condition is often more noticeable because of its appearance than because of severe pain.

Discomfort, mild irritation, and persistent redness may occur. Some people may also notice tenderness or local sensitivity. The rash often lasts a long time and may not improve with basic hygiene alone.

What to do: Circumcision is often the most effective treatment. Other options may include topical steroid creams, topical calcineurin inhibitors, or laser-based treatments. A medical evaluation is important to confirm the diagnosis and rule out similar-looking conditions.

6. Paraphimosis

Paraphimosis is an urgent condition in which the foreskin is pulled back and becomes stuck behind the glans. This can block normal blood flow and cause swelling at the end of the penis. It can make the foreskin and glans become painful, tight, and swollen.

Symptoms may include redness, pain, tightness, and inability to return the foreskin to its normal position. In severe cases, the glans may become darker in color. Urinary difficulty can also happen if swelling is significant.

What to do: Paraphimosis needs urgent medical treatment. The main treatment is reducing the swelling and moving the foreskin back into place. Severe or untreated cases may need a procedure or surgery to protect blood flow and prevent tissue damage.

7. Fixed drug eruption

A fixed drug eruption is a skin reaction that happens after taking a triggering medication. It can affect the penis and may cause localized swelling with round red, purple, or dusky patches. The reaction often comes back in the same place if the same medication is taken again.

The affected area may be itchy, painful, or tender. Blisters can also appear in some cases. The color may remain darker after the rash improves.

What to do: Treatment involves stopping the medication that caused the reaction. A topical steroid cream may be used to reduce inflammation and discomfort. Severe reactions or uncertain cases should be assessed by a doctor or dermatologist.

8. STI-related balanoposthitis

Some sexually transmitted infections can cause inflammation of the foreskin and glans. Swollen foreskin may occur when there is discharge, ulcers, blisters, or other genital lesions. The exact symptoms depend on the infection involved.

Other symptoms may include urethral discharge, sores, vesicles, tenderness, and enlarged lymph nodes in the groin. Pain with urination may also occur. Some infections can look similar, so testing may be needed to identify the cause.

What to do: Treatment depends on the specific infection. Antibiotics may be used for infections such as gonorrhea, chlamydia, or syphilis, while antiviral medicine may be used for herpes. Sexual partners may also need evaluation and treatment to prevent reinfection.

9. Penile abscess or trauma

A penile abscess is a pocket of infection that can cause localized swelling, pain, and redness. Trauma, including penile fracture, can also cause sudden swelling. These causes are less common for isolated swollen foreskin, but they can be serious.

An abscess may cause warmth, tenderness, pus, fever, or worsening pain. Penile trauma may cause bruising, sudden swelling, and severe pain. Penile fracture is especially urgent and may happen with a sudden injury during sexual activity.

What to do: A penile abscess usually needs drainage and antibiotics. Penile fracture needs urgent urologic repair. Severe pain, rapid swelling, bruising, fever, or signs of infection should be treated as urgent symptoms.