What Does It Mean When a Mole Develops Pus and a Black Speck? - Dermatology

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A mole has developed a growth?


Recently, I noticed that a mole has developed pus, and I squeezed out a small black object that feels hard, somewhat like a stone.
There is a hole in the wound.
I would like to know what that black object is.

Miss Lü, 10~19 year old female. Ask Date: 2016/04/30

Dr. Wu Yuxin reply Dermatology


Without actually seeing the lesion, it is difficult to make a definitive diagnosis.
If it is causing significant distress, please seek medical attention promptly.

Reply Date: 2016/04/30

More Info


When a mole or skin lesion develops pus and a black speck, it can indicate several potential issues that warrant further investigation. The presence of pus suggests that there may be an infection or inflammation occurring in or around the mole. The black speck, which you describe as being hard and resembling a stone, could be a number of things, including a keratin plug, a foreign body, or even a necrotic tissue.
In dermatology, moles (or nevi) can change in appearance due to various factors, including trauma, irritation, or infection. If a mole becomes inflamed, it may produce pus as the body attempts to fight off an infection. The pus is typically a mixture of dead white blood cells, bacteria, and tissue debris. The hard black speck could be a sign of a more serious condition, such as a melanoma, especially if the mole has changed in size, shape, or color, or if it has become painful or itchy.

It is crucial to note that any changes in a mole, particularly the development of pus or a hard black speck, should be evaluated by a healthcare professional, preferably a dermatologist. They can perform a thorough examination and may recommend a biopsy to determine the nature of the mole and to rule out any malignant changes. A biopsy involves removing a small sample of tissue for laboratory analysis, which can provide definitive information about the cells in the mole.

In addition to the physical examination, the dermatologist may ask about your medical history, any recent changes in your skin, and any other symptoms you may be experiencing. This information can help them make a more accurate diagnosis.

If the mole is found to be benign, treatment may involve simply draining the pus and monitoring the area for any further changes. However, if there are signs of malignancy, more aggressive treatment may be necessary, which could include surgical removal of the mole and surrounding tissue.

In summary, the presence of pus and a black speck in a mole is a concerning sign that should not be ignored. It is essential to seek medical attention promptly to ensure proper diagnosis and treatment. Early intervention can be critical in managing potential skin cancers and preventing further complications. Always remember that when it comes to skin changes, it is better to err on the side of caution and consult with a healthcare provider.

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