Infected Cysts: 6 Signs You Should See a Doctor

Sebaceous (epidermoid) cysts are usually harmless, slow-growing lumps beneath the skin. However, when a cyst becomes infected, it can quickly turn painful and may require medical treatment.

Recognising the early signs of an infected cyst is important to prevent complications and ensure prompt care.

What Is an Infected Cyst?

An infected cyst occurs when bacteria enter the cyst, leading to inflammation and infection. This can happen if the cyst ruptures, becomes irritated, or is squeezed.

Once infected, the cyst may fill with pus and become increasingly painful.

Common Infected Cyst Symptoms

infected sebaceous cyst removal before and afterIf you have a cyst, watch closely for the following warning signs:

1. Redness

The skin around the cyst may become red and inflamed, often spreading beyond the original lump.

2. Swelling

An infected cyst can become larger, tight, and swollen, sometimes quite quickly.

3. Pain or Tenderness

Unlike a normal cyst, which is usually painless, an infected cyst often becomes painful to touch or even throbbing.

4. Pus or Discharge

You may notice:

  • yellow or white discharge
  • A thick, foul-smelling substance
  • Leakage from the cyst

This is a key sign of infection.

5. Warmth

The skin over the cyst may feel warm or hot, indicating active inflammation.

6. Fever or Feeling Unwell

In more serious cases, infection can spread, leading to:

  • Fever
  • Fatigue
  • General feeling of illness

This requires urgent medical attention.

Why Do Cysts Become Infected?

Cysts can become infected for several reasons:

  • Squeezing or picking the cyst
  • Friction from clothing or shaving
  • Bacteria entering through a small opening (punctum)
  • Rupture of the cyst under the skin

Once bacteria are introduced, the body responds with inflammation, causing the classic symptoms of infection.

What Should You Do If a Cyst Is Infected?

1. Avoid Touching or Squeezing

This can worsen the infection and push bacteria deeper into the skin.

2. Keep the Area Clean

Gently clean the area with mild soap and water.

3. Seek Medical Advice

If you notice signs of infection, it’s important to have the cyst assessed by a medical professional.

A doctor may recommend:

  • Antibiotics (if infection is spreading)
  • Drainage of the cyst
  • Surgical removal once the infection has settled

When Is It Urgent?

You should seek prompt medical attention if:

  • The cyst is rapidly increasing in size
  • Pain is severe or worsening
  • Redness is spreading
  • You develop a fever
  • The cyst is located on the face or near sensitive areas

Delaying treatment can lead to complications such as abscess formation or deeper infection.

Can an Infected Cyst Go Away on Its Own?

Some mild infections may settle, but many do not fully resolve without treatment. Even if symptoms improve, the cyst itself often remains and may become infected again in the future.

This is why definitive removal is often recommended once the infection has cleared.

Professional Treatment for Infected Cysts

At Cosmedics Skin Surgery & Laser Clinic, infected cysts are assessed and treated by experienced doctors.

Treatment options include:

  • Careful drainage of infected cysts
  • Antibiotic management where appropriate
  • Complete surgical removal to prevent recurrence

Founded by Dr Ross Perry, the clinic offers expert care for a wide range of skin concerns, including cysts, lipomas, moles, and other lesions.

Book a Consultation

If you have a painful, swollen, or leaking cyst, don’t ignore it.

Early treatment can relieve discomfort quickly and prevent the infection from worsening.

Contact Cosmedics Skin Surgery & Laser Clinic today to arrange a consultation and get expert advice on the best treatment for your cyst.

Professional Sebaceous Cyst Removal

At Cosmedics Skin Surgery & Laser Clinic, sebaceous cyst removal is performed by experienced doctors using modern surgical techniques designed to minimise discomfort and scarring.

Founded by Dr Ross Perry, the clinic specialises in the treatment and removal of common skin lesions and lumps.

Treatments include removal of:

Clinics are located in London and Bristol, offering fast access to expert care without long waiting lists.

Book a Consultation

If you have a cyst that is growing, uncomfortable, or simply bothering you cosmetically, it may be worth having it assessed by a medical professional.

A consultation allows a doctor to confirm the diagnosis and discuss the best treatment options for safe and effective removal.

Contact Cosmedics Skin Surgery & Laser Clinic today to arrange an appointment with an experienced skin specialist.

Skin Surgery Laser Clinics

Cosmedics’ Skin Surgery Laser Clinic offer assessment of troublesome skin ‘lumps and bumps’ of all types.

Their private London and Bristol clinics offer private cyst removal and mole removal using the latest surgical techniques including laser treatment.

Our team of qualified and experienced doctors and surgeons also treat other skin blemishes, including sebaceous cystsskin tagswarts and lipoma using  freezing, laser or surgical techniques.

Cosmedics Skin Clinics was founded in 2003 by Dr Ross Perry, a qualified and experienced London GP who has an excellent reputation in skin treatments and has removed thousands of lesions/blemishes in his career.

For more information or to book a consultation, please complete the form on this web page or call 020 7386 0464.