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Skin cyst

Skin cysts are round lumps, often filled with fluid or pus. They're usually harmless and often do not need treatment. But see a GP if you have an unexplained lump.

Check if it's a skin cyst

Skin cysts:

  • are round lumps just underneath the skin
  • often contain fluid or pus
  • sometimes have a small, dark spot in the middle
  • grow slowly and vary in size from smaller than a pea to several centimetres across
  • can get sore or red if they get infected – the redness may be harder to see on black or brown skin
A round lump on a person’s left cheek. The person has white skin and the lump is the same colour as their skin.
A dark brown lump (an infected skin cyst) on a person with medium brown skin. There is a small, black spot in the middle of the lump.

Skin cysts can form on most areas of the body, including the head, face, neck, chest and back. It's also possible to get them on the scrotum or inside the vagina.

See a GP if:

  • you have a lump on your skin and you do not know what it is

Ask for an urgent GP appointment or get help from NHS 111 if:

  • you have a sore or red lump on your skin

You can call 111 or get help from 111 online.

Treatments for a skin cyst

Skin cysts do not need to be treated if they're not causing any problems.

But treatment may be recommended if you have:

  • an infected skin cyst – you may be given antibiotics
  • a large, painful cyst which interferes with everyday life – for example, a cyst on your head that catches when you brush your hair

Skin cyst removal

If you have a large, painful skin cyst which is making everyday tasks difficult, you may be able to have it removed on the NHS.

If it's not causing any problems but is on a visible part of your body, such as on your face, you may choose to have it removed. But you'll probably have to pay for this privately.

Local anaesthetic is used to numb the area around the cyst before it's cut out. You'll have a small scar after the wound has healed.

You may also get new skin cysts in the future.

Important

Do not squeeze a skin cyst. If it bursts it could become infected, or if it's already infected you might spread the infection.

Types of skin cyst

There are lots of different types of skin cyst. Here are some of the main types.

Different types of cyst
Location Type
Location

A cyst that develops in the top layer of skin (epidermis)

Type

Epidermoid cyst (sometimes known as a sebaceous cyst)

Location

A cyst that forms in a hair follicle, usually on the scalp

Type

Pilar cyst (also sometimes known as a sebaceous cyst)

Location

A cyst in a joint or tendon, most commonly on the wrists, hands and fingers

Type

Ganglion cyst

Location

A fluid-filled swelling on the back of the knee

Type

Baker's cyst

Location

A small, fluid-filled lump just inside the opening of the vagina

Type

Bartholin's cyst

Location

A small lump or swelling on the eyelid

Type

Meibomian cyst or chalazion

Causes of skin cysts

Anyone can get a skin cyst and it's not always known what causes them.

You may be more likely to get a skin cyst if:

  • a family member also has cysts (particularly pilar cysts)
  • you're an adult, particularly in middle age
  • you're a woman
  • you have acne
  • you have a rare condition, such as Gardner syndrome

Skin cysts are not cancerous and you cannot get them from someone who has one.

Last Reviewed
11 May 2023
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