Is It Normal for a Cyst to Leave a Small Hole After Scabbing? - Dermatology

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When dealing with sebaceous cysts, also known as epidermoid cysts or atheromas, it is not uncommon for patients to experience a small hole or opening after the cyst has scabbed over and healed. This can occur if the cyst ruptures or if there is a small incision made during treatment. The presence of a small hole can be concerning, especially if it is leaking pus or other fluids.

Firstly, it is important to understand that sebaceous cysts are typically benign and filled with keratin, a protein found in skin, hair, and nails. They can become inflamed or infected, leading to symptoms such as redness, swelling, and pain. In your case, it seems that the cyst was treated with medication and possibly an injection, which may have helped reduce inflammation but did not involve surgical drainage. This is a common approach when the cyst is not severely infected or inflamed.

After the cyst has scabbed over, it is possible for a small opening to remain. This opening can sometimes lead to drainage of fluid or pus, especially if the cyst was infected prior to treatment. If you notice that the small hole is leaking pus, it is essential to keep the area clean to prevent further infection. You can gently clean the area with mild soap and water. After cleaning, it is advisable to apply a topical antibiotic ointment, such as Neosporin, to help prevent infection. Avoid using alcohol or hydrogen peroxide, as these can irritate the skin and delay healing.

Regarding your concern about water exposure, it is generally okay to let the area come into contact with water during bathing, but you should avoid soaking the area in water (like in a bathtub) until it has fully healed. Keeping the area dry and clean is crucial, especially if there is an open wound. If the hole continues to leak pus or shows signs of infection (such as increased redness, warmth, swelling, or fever), it is important to seek medical attention. A healthcare provider may need to assess the area and possibly perform a drainage procedure if there is an abscess or significant infection.

In summary, while it is not uncommon for a cyst to leave a small hole after healing, it is important to monitor the area for any signs of infection. Keep the area clean, apply topical antibiotics as needed, and avoid excessive moisture. If you have any concerns or if the symptoms worsen, do not hesitate to consult with a healthcare professional for further evaluation and treatment.