Baker's cyst in children

A Baker's cyst is a fluid-filled lump that can develop behind your child's knee - we can help treat it

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What is a Baker's cyst in children?

A Baker's cyst is a visible, fluid-filled lump which can form at the back of your child's knee. It happens when there is an extra build-up of fluid inside the bursa (small sac of fluid) between the calf and knee joint. Also known as popliteal cysts, they're quite common in boys between four to eight years old.

Need to know

Usually, a child with a cyst will have no symptoms other than the visible lump at the back of their knee. This lump normally goes away on its own. In other cases, a Baker's cyst may lead to other symptoms, like:

  • a feeling of tightness behind the knee
  • a build-up of fluid around the knee
  • pain in the calf and knee
  • an ache in the knee
  • clicking in the knee

Your GP or consultant will usually be able to make a diagnosis by discussing your child's symptoms and examining the cyst.

They will let you know if they need to carry out further tests to rule out other conditions. Additional tests might include an MRI or ultrasound scan.

If your child's cyst isn't causing any symptoms, treatment may not be necessary, as the cyst will often go away on its own. Your GP or consultant may recommend over-the-counter medicines or advise you on how to treat the cyst at home. Depending on the nature of your child's cyst, your GP or consultant may recommend draining the cyst or surgery (if the cyst has caused any significant damage around the knee).

Our Baker's cyst in children locations

Institute of Sport Exercise and Health (ISEH)

170 Tottenham Court Road W1T 7HA London
The Harley Street Clinic

The Harley Street Clinic

35 Weymouth Street W1G 8BJ London
The Portland Hospital

The Portland Hospital

205-209 Great Portland Street W1W 5AH London
The Princess Grace Hospital

The Princess Grace Hospital

42-52 Nottingham Place W1U 5NY London
The Lister Hospital

The Lister Hospital

Chelsea Bridge Road, SW1W 8RH London
The Shard Outpatients

The Shard Outpatients

The Shard, 32 St Thomas Street SE1 9BS London

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This content is intended for general information only and does not replace the need for personal advice from a qualified health professional.