Red Swollen Lump on Buttocks: Causes and When to See a Doctor - Dermatology

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A red swollen lump on the buttocks can be concerning, especially if it causes discomfort while sitting. There are several potential causes for such a lump, and understanding these can help determine whether you need to see a doctor.

One common cause of a red swollen lump in that area is a sebaceous cyst. These are non-cancerous lumps that can form when a hair follicle or skin pore becomes blocked. They can become inflamed or infected, leading to redness and swelling. If the lump is soft and movable, it may be a cyst.
Another possibility is a boil (furuncle), which is a painful, pus-filled bump that forms under the skin due to bacterial infection, often caused by Staphylococcus aureus. Boils can be red, swollen, and tender, and they may require drainage if they do not resolve on their own.

A lipoma is another type of lump that is usually soft, movable, and painless. These are benign tumors made of fat tissue and are generally harmless. However, they can sometimes become uncomfortable if they press on surrounding tissues.

In some cases, a hematoma (a localized collection of blood outside of blood vessels) can occur due to trauma or prolonged pressure on the area, especially if you sit for long periods. This can lead to swelling and discoloration.

Given your description of the lump being painful when sitting, it is advisable to monitor it closely. If the lump becomes larger, increasingly painful, or shows signs of infection (such as increased redness, warmth, or discharge), you should seek medical attention. Additionally, if you notice any systemic symptoms like fever or chills, it would be prudent to see a doctor promptly.

In terms of whether your prolonged sitting is related to the lump, it is possible. Sitting for extended periods can lead to pressure on certain areas of the body, potentially contributing to the formation of lumps or exacerbating existing ones. It is important to take regular breaks to stand, stretch, and move around to alleviate pressure on your buttocks and improve circulation.

If you decide to see a doctor, they will likely perform a physical examination and may recommend imaging studies, such as an ultrasound, to better understand the nature of the lump. Depending on the diagnosis, treatment options may vary from simple observation to drainage or surgical removal if necessary.

In summary, while a red swollen lump on the buttocks can have several benign causes, it is important to monitor it and seek medical advice if it worsens or does not improve. Regular movement and avoiding prolonged pressure on the area can also help prevent further issues.