Skin Cyst

A skin cyst is a closed capsule or sac-like structure that forms under the skin, typically filled with fluid, semi-solid, or gaseous material.

Types of Skin Cysts

  • Epidermoid cysts: Also known as sebaceous cysts, these are the most common type and occur when skin cells multiply and form a cyst under the skin.
  • Pilar cysts: These occur on the scalp and are usually filled with a semi-solid material.
  • Trichilemmal cysts: Similar to pilar cysts, but typically occur on the scalp or face.
  • Dermoid cysts: These can occur anywhere on the body and contain skin, hair, and other tissue.

Causes and Risk Factors

Skin cysts can be caused by a variety of factors, including:

  • Genetics: Some people may be more prone to developing skin cysts due to their genetic makeup.
  • Blockage of oil glands or hair follicles: This can cause the formation of a cyst.
  • Injury or trauma: A skin cyst can form as a result of injury or trauma to the skin.
  • Infection: Bacterial or fungal infections can cause the formation of a skin cyst.

Symptoms

The symptoms of a skin cyst may include:

  • A lump or bump under the skin
  • Redness and inflammation around the cyst
  • Pain or tenderness when touched
  • Discharge or drainage from the cyst

Diagnosis

A skin cyst is typically diagnosed through a physical examination and medical history. In some cases, additional tests may be necessary to confirm the diagnosis, such as:

  • Blood tests: To rule out underlying infections or other conditions.
  • Imaging tests: Such as X-rays or ultrasound to determine the size and location of the cyst.
  • Biopsy: A sample of tissue may be taken from the cyst for examination under a microscope.

Treatment

The treatment for a skin cyst depends on the type, size, and location of the cyst. Treatment options may include:

  • Watchful waiting: Small, asymptomatic cysts may not require treatment.
  • Drainage: The cyst can be drained with a needle or surgically removed.
  • Surgical excision: The entire cyst is removed surgically.
  • Antibiotics: If the cyst becomes infected, antibiotics may be prescribed to treat the infection.

Complications

If left untreated, skin cysts can lead to complications such as:

  • Infection: Bacterial or fungal infections can occur if the cyst is not properly treated.
  • Abscess formation: A pocket of pus can form around the cyst, leading to further inflammation and infection.
  • Scarring: Surgical removal of a skin cyst can result in scarring.

Prevention

To reduce the risk of developing skin cysts:

  • Practice good hygiene: Keep the skin clean and dry to prevent blockage of oil glands or hair follicles.
  • Avoid picking or squeezing: Avoid picking or squeezing pimples, blackheads, or other skin lesions, as this can lead to infection and cyst formation.

Frequently Asked Questions (FAQs)

What is a skin cyst?
A closed capsule or sac-like structure under the skin, typically filled with fluid or semi-solid material.

What causes skin cysts?
They can be caused by a variety of factors, including genetic conditions, injury, and blockage of oil glands.

Are skin cysts painful?
Some skin cysts may be painful, especially if they become infected or inflamed.

Can skin cysts be cancerous?
Most skin cysts are benign, but in rare cases, they can be malignant.

How are skin cysts diagnosed?
Diagnosis is typically made through physical examination and sometimes imaging tests or biopsy.

Can skin cysts be treated at home?
Some small skin cysts may resolve on their own, but most require medical attention for proper treatment.

What are common treatments for skin cysts?
Treatments include drainage, surgical removal, and antibiotics if infected.

Can skin cysts recur after treatment?
Yes, some skin cysts can recur after treatment, especially if the underlying cause is not addressed.

Are there different types of skin cysts?
Yes, there are several types, including epidermoid cysts, pilar cysts, and sebaceous cysts.

Can anyone get a skin cyst?
Yes, skin cysts can occur in people of all ages and backgrounds, but some types may be more common in certain populations.

Article last updated on: 18th October 2025.
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