Can Lipomas Move? Skin Lumps and Their Behavior - Dermatology

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Lipomas, commonly referred to as fatty tumors, are benign growths composed of adipose (fat) tissue. They are generally soft, movable, and painless, which distinguishes them from other types of skin lumps. In your case, it sounds like you initially had a lump in your left groin area that was diagnosed as a lipoma or possibly an epidermoid cyst (often referred to as a "sebaceous cyst").
To address your question about whether lipomas can move: yes, lipomas are typically mobile under the skin. This means that when you touch them, they can shift slightly in position. However, they do not usually change locations on their own. If you noticed that the lump on the left side has disappeared and a new one has appeared on the right side, it is more likely that you have developed a new lipoma or cyst rather than the original one moving.
Epidermoid cysts, which are often confused with lipomas, can also feel firm and may be tender to the touch, especially if they become inflamed or infected. The pain you are experiencing when you touch the new lump could suggest that it is an epidermoid cyst or another type of growth that may require further evaluation.

The disappearance of the left-sided lump could be due to several factors. Sometimes, cysts can rupture or drain, leading to a reduction in size or complete resolution. Alternatively, it is possible for new lipomas or cysts to develop in different locations, which is not uncommon.
If you are concerned about the nature of these lumps, it is advisable to consult a healthcare professional, preferably a dermatologist or a surgeon, who can perform a physical examination and, if necessary, imaging studies or a biopsy to determine the exact nature of the lump.
In summary, while lipomas are generally movable, the appearance of a new lump in a different location is likely due to the formation of a new growth rather than the original one migrating. It is essential to monitor any changes in size, shape, or pain associated with these lumps and seek medical advice for a proper diagnosis and treatment plan.