Restless legs syndrome (RLS) is a common condition affecting the nervous system, which causes an overwhelming, irresistable urge to move the legs.
It also causes an unpleasant feeling in the feet, calves and thighs, which is often felt as a crawling or creeping sensation.
The symptoms of RLS can vary from being mild to severe. In severe cases, the condition can be distressing and can disrupt daily activities.
Some people have symptoms now and again, while others have them every day. Read more about the symptoms of restless legs syndrome.
RLS is sometimes known as Ekbom syndrome.
Causes of RLS
In the majority of cases, there is no obvious cause of RLS. Doctors may refer to this as idiopathic RLS, or primary RLS. This type of RLS can run in families.
Some neurologists (experts in treating conditions that affect the nervous system) share the opinion that the symptoms may have something to do with low levels of a chemical called dopamine in the body. Dopamine plays a role in controlling muscle movement, and low levels of this chemical may cause the involuntary leg movements associated with RLS.
Some cases of RLS are caused by an underlying health condition, such as iron deficiency anaemia, or kidney failure. Doctors may refer to this as secondary RLS.
There is also a link between RLS and pregnancy and around one in five pregnant women will experience symptoms of RLS in the last three months (third trimester) of their pregnancy, although it is not clear exactly why.
Read more about the causes of restless legs syndrome.
Treating RLS
Mild cases of RLS that are not linked to an underlying health condition may not require any treatment other than making a few lifestyle changes, such as:
- quitting smoking (if you smoke)
- avoiding alcohol and caffeine
- exercising regularly
If RLS is more troublesome, medication may be needed to regulate the levels of dopamine in the body.
If RLS is caused by iron deficiency anaemia, for example, then iron supplements may be all that is needed to treat the RLS symptoms.
Read more about the treatment of restless legs syndrome.
Who is affected?
As many as one in ten people are affected by RLS at some point in their life.
Women are twice as likely to develop RLS than men. The condition is also more common in middle age, but the symptoms can develop at any age, including childhood.
Outlook
Often, addressing the underlying cause of RLS will cure the person of symptoms. If RLS is related to pregnancy, it will usually go away once a woman has given birth.
However, when the cause for RLS is unknown, the symptoms can get worse with time and severely affect the person's life. It is however not life-threatening, but it can severely disrupt sleep and trigger anxiety and depression.
The Ekbom Support Group offers support and more information for people affected by restless legs syndrome, and they may be able to put you in touch with others affected by the condition.