a Bump at the Base of the Penis: Causes and Concerns - Urology

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There is a protrusion at the base of the penis?


Hello, doctor.
Recently, I discovered a bump at the base of my penis that is about the size of a slightly larger pimple, located on the left side beneath the skin.
It is pink in color.
At first, I thought it was a pimple caused by poor hygiene, but over the past few days, I have noticed that the hard lump is quite prominent during masturbation.
It is not very painful, but it feels uncomfortable, and pressing on it causes some pain.
I currently have no sexual experience, so I am not considering sexually transmitted infections.
I would like to ask the doctor what this condition might be.

Mr. Chen, 10~19 year old female. Ask Date: 2020/08/24

Dr. Du Shixi reply Urology


Hello: It is likely inflammation (without sexual intercourse).
It is still recommended to seek medical attention.
Wishing you good health.

Reply Date: 2020/08/24

More Info


When it comes to a bump at the base of the penis, there are several potential causes that could explain the symptoms you're experiencing. Given that the bump is described as being about the size of a larger pimple, pink in color, and located on the left side of the penis, it is important to consider a few possibilities.

1. Sebaceous Cyst: One common cause of bumps in this area is a sebaceous cyst. These are non-cancerous lumps that can occur when a sebaceous gland becomes blocked. They are usually painless but can become uncomfortable if they become inflamed or infected.

2. Pearly Penile Papules: Another possibility is pearly penile papules, which are small, harmless bumps that can appear around the corona of the glans. They are normal anatomical variations and do not require treatment.

3. Folliculitis: If the bump is tender and you have been engaging in activities that may irritate the area (like masturbation), it could be folliculitis, which is an inflammation of the hair follicles. This condition can occur due to irritation, infection, or blockage of the follicles.

4. Lymphocele: Sometimes, a buildup of lymph fluid can create a lump in the genital area, known as a lymphocele. This can occur after trauma or surgery but is generally harmless.

5. Infection or STD: While you mentioned that you do not have sexual experience and thus do not suspect a sexually transmitted disease (STD), it’s still important to consider that infections can occur in various ways, including through skin-to-skin contact. Conditions like herpes or warts can present as bumps, although they typically have additional symptoms.

6. Other Dermatological Conditions: Conditions such as molluscum contagiosum, which is a viral infection that causes raised, pearl-like bumps, or other dermatological issues could also be a factor.

Given that the bump is causing discomfort and you are experiencing pain upon pressure, it is advisable to seek medical attention. A healthcare provider can perform a physical examination and may recommend further tests if necessary. They can provide a definitive diagnosis and appropriate treatment options.

In the meantime, here are some general recommendations:
- Avoid Irritation: Try to avoid any activities that may irritate the area, such as vigorous masturbation or tight clothing.

- Maintain Hygiene: Keep the area clean and dry. Use mild soap and avoid harsh products that could irritate the skin.

- Monitor Symptoms: Keep an eye on the bump for any changes in size, color, or if additional symptoms develop, such as pain, discharge, or fever.

In conclusion, while the bump you are experiencing could be benign, it is essential to consult a healthcare professional for an accurate diagnosis and peace of mind. Early intervention can help address any potential issues before they become more serious.

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