To sleep well

It's been days that my husband is complaining of not having a goodnight sleep and having headaches because of it.Normally he drinks a lot of espresso coffee a day but now he try to lessen his coffee intake.Thinking it would help him to sleep better but no,he still couldn't sleep well.I told him he might have an insomnia.He knew that sometimes,I myself couldn't sleep well for nights.I even almost took an insomnia treatment if it didn't get better.Luckily,it went back to normal and I now sleep better.I told my husband that he try not to think many things,not to stress himself and less intake of coffee.