Is Your Cyst Infected? Signs, Symptoms, and Treatment Options

Inflammation of a sebaceous cyst?

Hello doctor, I have had a lump on my back for about two to three years, which I believe is a sebaceous cyst.
At that time, I squeezed it and white discharge came out, which had a bit of a foul smell.
It later shrank but has been growing larger recently.
I occasionally squeeze it, but nothing comes out anymore, yet there is still an odor.
It seems to be inflamed these past few days because it hurts when touched.
Can you confirm if this is indeed a sebaceous cyst? Is surgery necessary? Here is the photo: https://ppt.cc/[email protected]

Guang, 40~49 year old female. Ask Date: 2022/01/24

Dr. Wu Yuxin reply Dermatology

Seek medical attention first.
Is it a sebaceous cyst? Whether surgery is needed should be determined by a clinical physician.

Reply Date: 2022/01/24

More Info

When it comes to cysts, particularly sebaceous cysts (often referred to as epidermoid cysts), there are several signs and symptoms that can indicate whether the cyst is infected. Based on your description, it seems that you have been dealing with a cyst on your back for a couple of years. You mentioned that it initially had a foul-smelling discharge, which is a common characteristic of an infected cyst. The fact that it has recently increased in size and is now painful to touch suggests that there may be an infection present.

Signs of an Infected Cyst
1. Pain and Tenderness: If the cyst is painful when touched, this is often a sign of inflammation or infection.

2. Redness and Swelling: Infected cysts typically exhibit redness and swelling around the area.

3. Warmth: The skin over the cyst may feel warm to the touch, indicating inflammation.

4. Foul Odor: As you noted, a foul smell can be associated with the discharge from an infected cyst.

5. Increased Size: If the cyst has grown larger, this could indicate that it is becoming more inflamed or infected.

Diagnosis
To determine if your cyst is indeed a sebaceous cyst and whether it is infected, a healthcare provider would typically perform a physical examination. They may also ask about your medical history and any symptoms you are experiencing. In some cases, imaging studies like an ultrasound might be used to assess the cyst's characteristics.

Treatment Options
1. Observation: If the cyst is not causing significant discomfort or signs of infection, a doctor may recommend simply monitoring it.

2. Antibiotics: If an infection is confirmed, antibiotics may be prescribed to help clear the infection.

3. Incision and Drainage: If the cyst is infected and causing pain, a healthcare provider may recommend an incision and drainage procedure. This involves making a small cut in the cyst to allow the pus and infected material to drain out.

4. Surgical Removal: If the cyst is recurrent or bothersome, surgical removal may be the best option. This procedure involves excising the entire cyst and its contents to prevent it from returning.

When to Seek Medical Attention
Given your symptoms of pain, foul odor, and increased size, it would be advisable to seek medical attention sooner rather than later. An infected cyst can lead to complications if not treated properly, including the risk of abscess formation or spreading the infection to surrounding tissues.

Conclusion
In summary, based on your description, it is quite possible that your cyst is infected, especially given the symptoms of pain and odor. It is essential to consult with a healthcare provider for an accurate diagnosis and appropriate treatment. They will be able to assess the cyst and recommend the best course of action, which may include antibiotics, drainage, or surgical removal. Remember, self-treatment by squeezing the cyst can lead to further complications, so it's best to leave it to the professionals.

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