Bump or Pimple on Penis: 10 Causes & Treatment Options

October 2022

Little bumps or pimples on the penis are usually benign and related to conditions such as pearly penile papules or Fordyce spots.

It is normal that any change to your penis makes you feel anxious, but there is a low probability that it could be a sign of cancer. Although it is rare for lumps or pimples on the penis to be related to cancer, there are situations where it can be a symptom.

If you are unsure of any changing appearance in your penis, you should see your urologist to identify the problem and start the correct treatment.

What causes bumps on the penis

The most common causes of bumps or pimples on the penis are: 

1. Pearly penile papules

These papules are small, white, pimple-like lumps that can appear under the head of the penis. They are also referred to as Tyson glands, and are often mistaken for genital warts. These bumps are normal and benign glands that can appear at birth, but usually emerge during adolescence. Apart from being a cosmetic abnormality, Tyson glands cause no pain or any other major change.

Read more about what causes pearly penile papules and symptoms associated with them.

How to treat it: Usually no treatment is required, but if the papules drastically change the appearance of the penis, the urologist may recommend cryotherapy or cauterization treatments.

2. Fordyce spots

Fordyce spots are very common, benign white or yellow spots that appear on the head or shaft of the penis. They are unrelated to any type of sexually transmitted infection. Due to hormonal changes, these spots more frequently emerge during adolescence, but they can appear at any age.

Learn more about what can cause fordyce spots and how they are treated. 

How to treat it: The treatment is aimed at achieving cosmetic goals only. Procedures to remove the spots can vary, from using urethane tretinoin gel to lasering the spots. It is noted that, normally, it is not possible to completely eliminate these types of spots.

3. Genital warts

Genital warts are caused by infection of human papilloma virus, or HPV. Skin changes will be visible - although the penis skin will retain its normal colour, the skin will feel rougher when palpated (like the top of a cauliflower). Genital warts can vary in size and they are usually easily visible. Most times, they do not cause pain.

Genital warts usually appear after unprotected sexual intercourse, whether anal, vaginal or oral, with a previously infected person.

How to treat it: If symptoms emerge, ointments such as podophyllin may be prescribed by the urologist to eliminate the warts. However, it is common for warts to come back, as it takes several years for the body several years to successfully fight off this HPV virus. Check-out more information about warts on the penis and how they can be treated. 

Genital warts
Genital warts

4. Lymphocele

This is a type of hard lump that can appear on the penis shaft, especially after sexual contact or masturbation. It happens when the lymphatic system is unable to remove fluid from the penis due to the swelling, which closes the lymphatic pathways. A lymphocele usually disappears a few minutes or hours after it appears.

How to treat it: This is a benign lump that disappears on its own and doesn’t require any medical treatment. Massaging the lump can help drain the fluid faster. If the lump doesn’t disappear within hours, consult your urologist to identify the cause and start treatment.

5. Lichen planus

Lichen planus is a skin irritation that can affect the penis. It appears as small itchy bumps, pimples or red lumps. The cause of this problem is not known, but it usually goes away on its own after a few weeks and may reappear several times over the years.

How to treat it: Treatment only helps to reduce symptoms and, in most cases, is done with the use of topical corticosteroids. Your doctor may also recommend a antihistamine, especially if you are experiencing severe itching.

6. Peyronie's disease

Peyronie's disease is the development of plaque, or scarring, in the corpus cavernosum of the penis, and can manifest as hard lumps localized to one side. Other symptoms such as a painful erection or curving of the penis during erection are also common. The cause of Peyronie's is unknown.

How to treat it: The urologist may inject collagen or verapamil directly into the lump to reduce the scarring production that is causing the lump to grow, but in most cases, surgery is needed to correct the changes.

7. Penile cancer

This is one of the rarest forms of cancer. It can cause the appearance of lumps, ulcers or sores, particularly on the head of the penis. This type of cancer is more common in men over 60 who have a history of smoking and lack adequate hygiene habits. Penile cancer can also occur when there is exposure of the area to ultraviolet radiation or when there is prolonged exposure to irritants.

How to treat it: Treatment almost always starts with surgery to remove as many cancer cells as possible, followed by chemotherapy or radiation. In more severe cases, it may be necessary to remove the penis to prevent cancer from spreading to other parts of the body.

8. Allergy

Skin allergies are one of the most common and least severe reasons for pimples or bumps on the penis. They can appear following the use of soaps, condoms, lubricants or even after contact with specific fabric, like synthetic-based fabric instead of cotton-based ones. 

How to treat: It is important to identify what is causing the allergy so that you can avoid contact with the fabric or substance. Using cotton-based fabrics and mild soaps when cleansing the genital area is also advised. You should avoid chemical or scented products. If you suspect a latex allergy, you should avoid using latex condoms.  

9. Genital herpes

Genital herpes is a sexually-transmitted infection caused by the herpes simplex virus. It is spread through unprotected sex and can lead to symptoms like bumps or lumps on the penis which erupt into wounds. These wounds are often painful and itchy and can appear in the perianal area.  Learn more about the symptoms associated with genital herpes

How to treat: If you notice symptoms following unprotected sex, you are advised to consult your family doctor for a clinical evaluation.  If a diagnosis is confirmed, it is important to follow treatment as prescribed, and to notify your sexual partner to also start treatment, 

10. Molloscum contagiosa 

Molloscum contagiosa is an infectious disease caused by the Poxvirus. IT can affect the genital region and can cause symptoms like small, painless rashes or bumps that are skin-colored, except on the hands or feet. The rashes and/or bumps are usually small, ranging from 2 to 5 mm in diameter, however people with weaker immune system may notice sizes of 15 mm in diameter. 

This infection is transmitted through direct contact with the lumps during sexual contact or from sharing contaminated clothes or towels with infected people. 

How to treat: Treatment should be guided by a dermatologist, who may prescribe topical medications like imiquimod 5% ou tretinoin. The doctor may also recommend laser therapy or cryotherapy.  

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Edited by Tua Saude editing team in October 2022. Clinical review completed by Dr. Rodolfo Favaretto - Urologist in September 2019.
Clinical review:
Dr. Rodolfo Favaretto
Urologist
Dr. Favaretto is registered to practice under the CRM-SP license #133358 (Brazil). He has specialized in urology since 2016 and is a member of the American Urology Association.