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Urology/Circular lump on a penis



Im 19 ,and few days ago noticed this white almost like perfect ball shaped structure under the skin on my penis(it is around 4 mm in diameter).It is solid and appears to move a little on touching,but springs back to original position afterwards.It is visible only when I pull my foreskin back,otherwise I can feel it as a solid mass(on the skin of the head area).It doesnt cause any pain,unless I squeeze it .Really worried as to what it is ,as I never had anything like it before.Would you know what it may be ?

Thank you


We are not permitted to make diagnoses on this forum which is intended only for general information questions.  However, I can tell you that most small lumps on the surface of the penis are pretty benign things like cysts or blocked sebaceous glands.  Really nasty things, like penile cancers, are extremely rare and appear very irregular and almost always either form an ulcer or a thickening mass that would appear far different than your small lump.  Have it checked by your physician.

Technically, you asked if I know what it could be.  The answer to that is yes!  

Just kidding.  But I will tell you that this appears quite benign.


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Stephen W. Leslie, MD


Questions concerning erectile dysfunction, kidney stones and prostate disorders including prostate cancer. I have a special interest in kidney stone disease prevention.


Full time practicing urologist with 30 years experience. Associate Professor of Surgery and Chief of Urology at Creighton University Medical Center. Editor in Chief of eMedicine Urology internet textbook. Author of only NIH approved book written for patients by a urologist on the subject of kidney stones "The Kidney Stones Handbook". Inventor of the "Parachute" and "Escape" kidney stone baskets and the "Calculus" stone prevention analysis computer program.

American Urological Association, Ohio State Medical Association, Sexual Medicine Society

Men's Health, Journal of Urology, Urology, Healthwatch Magazine, Emergency Medicine Monthly, eMedicine, "The Kidney Stones Handbook", and numerous articles in various newspapers. He is also the editor of the Urology Board Review by McGraw-Hill used by urologists to study for their Board Certification Examinations.

Graduate of New York Medical College with residencies completed at Metropolitan Hospital New York, Albany Medical Center and University of Wisconsin-Madison.

Awards and Honors
Thirlby Award of the American Urological Association. Rated as one the country's Best Urologists by the Independent Consumer's Research Institute

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