What is sleep talking?

Many people talk in their sleep without knowing what they are saying. Sometimes, they mumble a few unclear words, while at other times they may speak in complete sentences. People sleeping nearby may hear them but understanding what they mean can be difficult.

The medical term for talking during sleep is somniloquy. It is a type of sleep behaviour known as parasomnia. This group includes unusual activities during sleep, such as talking, walking or making unexpected movements.

Why do people talk in their sleep?

Sleep has different stages including deep sleep and rapid eye movement (REM) sleep. The brain remains active during these stages and some people may talk while sleeping.

This can happen at different points during the night.

However the words a person says in their sleep do not always have a clear meaning. They do not necessarily show what the person is thinking about or dreaming of at that moment.

What causes sleep talking?

Experts suggest that sleep talking may run in families. Several other factors may also be linked to this behaviour including.

Stress

Daily worries and mental pressure may affect sleep.

Anxiety

People experiencing anxiety may have changes in their sleep patterns.

Emotional experiences: Difficult or upsetting experiences may sometimes affect sleep.

Family history

Sleep talking appears to be more common in some families. Depression and other mental health conditions may also be linked to sleep problems.

However sleep talking does not always have a clear cause and occasional episodes are usually not a sign of a serious health problem.

Do sleep talkers reveal their thoughts?

Sometimes, the words people say in their sleep sound similar to things they experienced or thought about during the day.  A person may also say something unexpected while falling asleep or waking up.

However sleep talking does not necessarily reveal a person’s true feelings, secrets, or thoughts. The words may be unclear or unrelated to anything happening in their daily life. Similarly a sentence spoken during sleep does not mean the person has found an answer to a problem.

When should you be concerned?

Occasional sleep talking is generally harmless and may not require treatment.  However it is a good idea to consult a doctor if it happens frequently or begins to affect sleep quality.

Medical advice may also be helpful if sleep talking occurs alongside loud screaming, unusual body movements or excessive sleepiness during the day. These symptoms may point to another sleep related problem that needs attention.

In short, talking during sleep is a common behaviour that can have different causes. Although it may sound meaningful the words spoken during sleep should not automatically be taken as a reflection of a person’s thoughts or feelings.