How to deal with a nightmare scenario

Nightmares are more common than many realise. After waking startled, you often forget the disturbed dream quickly. However, we now know more about what is happening to your body. Sleep laboratory studies have revealed your cardiovascular system is getting an intense workout - as your heart rate and blood pressure escalates - because your body feels it's escaping some terrifying ordeal.

- DR RAJ PERSAUD, Harley Street consultant psychiatrist and author of The Mental Vaccine for Covid-19, on coping with bad dreams

Scientists now suggest repeated nightmares could be a risk factor for cardiovascular problems, such as sustained elevated blood pressure when awake. Heart rhythm is more likely to become irregular during stressful sleep, meaning you should pay more attention to nightmares.

The occasional unpleasant encounter while asleep is probably harmless, but if you suffer two or more nightmares a week, it's possible these are symptoms of some kind of underlying psychological disorder.

Try to secure treatment as they could be damaging your heart and frazzling your nerves. Classically sufferers seek sedative medication but that can become addictive in the long run.

If your nightmares began on new medication, be aware bad dreams can be a side-effect of various drugs.