Restless legs syndrome

What causes restless legs syndrome?

In the majority of cases, there's no obvious cause of restless legs syndrome.

This is known as idiopathic or primary restless legs syndrome, and it can run in families.

Some neurologists (specialists in treating conditions that affect the nervous system) believe the symptoms of restless legs syndrome may have something to do with how the body handles a chemical called dopamine.

Dopamine is involved in controlling muscle movement and may be responsible for the involuntary leg movements associated with restless legs syndrome.

In some cases, restless legs syndrome is caused by an underlying health condition, such as iron deficiency anaemia or kidney failure. This is known as secondary restless legs syndrome.

There's also a link between restless legs syndrome and pregnancy. About 1 in 5 pregnant women will experience symptoms in the last 3 months of their pregnancy, although it's not clear exactly why this is.

In such cases, restless legs syndrome usually disappears after the woman has given birth.

Read more about the causes of restless legs syndrome.

Treating restless legs syndrome

Mild cases of restless legs syndrome that aren't linked to an underlying health condition may not require any treatment, other than making a few lifestyle changes.

These include:

• adopting good sleep habits (for example, following a regular bedtime ritual, sleeping regular hours, and avoiding alcohol and caffeine late at night)
• quitting smoking if you smoke
• exercising regularly during the daytime

If your symptoms are more severe, you may need medication to regulate the levels of dopamine and iron in your body.

If restless legs syndrome is caused by iron deficiency anaemia, iron supplements may be all that's needed to treat the symptoms.

Read more about treating restless legs syndrome.

Who's affected by restless legs syndrome?

Restless legs syndrome is a common condition that can affect anyone at any point in their life.

But women are twice as likely to develop restless legs syndrome as men.

It's also more common in middle age, although the symptoms can develop at any age, including childhood.

Outlook

The symptoms of restless legs syndrome will usually disappear if it's possible to address an underlying cause. 

But if the cause is unknown, the symptoms can sometimes get worse with time and severely affect the person's life.

Restless legs syndrome isn't life threatening, but severe cases can disrupt sleep (causing insomnia) and trigger anxiety and depression.

The charity Restless Leg Syndrome UK provides information and support for people affected by restless legs syndrome.

They may be able to put you in touch with other people in your area affected by the condition.