insomnia

Scientists are also learning more about the causes of dementia, such as pollution, insomnia and drinking alcohol.

Nearly a third of them still suffer fear of rain and loud noises and a quarter experience nightmares or insomnia, according to Save the Children.

Patients may have muscle tension and rapid breathing, and report symptoms like headaches and insomnia, ringing in the ears, and cardiovascular, respiratory, and gastrointestinal issues.

Symptoms are wide-ranging but can include persistent sadness or low mood, problems looking after yourself, insomnia and withdrawing from other people.

Reports of lingering symptoms -- dubbed "post-finasteride syndrome" -- include insomnia, panic attacks, cognitive dysfunction, and suicidal thoughts that persist months or even years after stopping treatment.