If you find any bumps on penis or the scrotum, chances are you are going to panic. Moreover, when it comes to dark or red bumps on penis it is more frustrating and worrisome for most individuals. People are often scared as having cancer or some sort of sexually transmitted disease. We understand how embarrassed you may be feeling because of the bumps you have on your penis, but always remember to get it checked by the doctor. Don’t be scared, your doctor is not going to chop it off, and the earlier you get it diagnosed and treated, the less likely you have chances of having anything serious. In fact, most of the common asymptomatic bumps are totally harmless.
In this article we’ll try to include all the possible common, uncommon or rare causes of black, dark or red bumps on penis and the scrotum. Please remember that self-diagnosis of such bumps on penis might be misleading and can get you in trouble later, so always seek medical advice before you come to some conclusion.
Most common causes of pigmented or red bumps on penis and scrotum
They are small bright red or black blue vascular lesion 1-4mm in diameter commonly appearing in the scrotum, but these lesions can be seen on shaft of penis (labia majora in women), inner thigh and lower abdomen. The over lying surface may be mild scaly, however it is less evident in young individuals. Lesions are usually asymptomatic but may bleed after scratching or intercourse, few people complain of itching and pain. The lesions might look scary bit are harmless.
Melanocytic naevi (Moles) of the penis
Moles are quite common presentation on penis; they can be flat or slightly raised brown to dark color. They are usually harmless and do not requirement any treatment. But you should immediately visit doctor if you see any changes in size, color and texture of the lesion.
Bowenoid papulosis are the bumps on penis that are caused by human papilloma virus. Clinically they represent genital warts and look like small skin color or reddish brown bumps that are commonly located on shaft of penis. Although most of the lesion is harmless, few lesions can turn into invasive malignant cancer. They can be treated with local destruction.
Seborrheic keratosis of the penis
Seborrheic keratosis are harmless lesion that are seen commonly seen on sun exposed area, but uncommon cases can be seen on the genital area such as on shaft of penis. Sometimes their location can cause diagnostic error and also can have negative influence on sexual life. Good news is that seborrhoeic keratoses are totally harmless and rarely or never turn into malignant cancer.
Other conditions that can commonly present as pigmented or red bumps on penis and scrotum
Inflamed viral wart
Inflamed Molluscum contagiosum
Other possible causes of pigmented or red bumps on penis and scrotum
Early chancre of primary syphilis
Primary granuloma inguinale (donovanosis)
Primary lymphogranuloma venereum
Insect bite and tick bite
Tuberculide (lichen scrofulosorum)
Inflamed epidermoid cyst
Other possible disease that should always be ruled out if there is any suspicion
Angiokeratoma corporis diffusum
Langerhans cell histiocytosis
1. Fitzpatrick’s Dermatology in General Medicine
2. Rook’s Textbook of Dermatology