Hi Sylvia,
I think fighting insomnia is a great niche idea. Sleep wellness is a very broad topic. But insomnia is one of many sleep disorders, so you're honing in more. I think you can write about insomnia for a long time to establish some authority in that area. Over time you could expand to related sleep wellness issues.

Good luck!!

Hi Sylvia, I think insomnia is a huge niche. I feel people need to be educated on the importance of sleep. Lack of sleep can cause many health problems.

Some Health Issues Caused by Insomnia May Include:

Stroke
Asthma attacks
Seizures
Weak immune system
Sensitivity to pain
Inflammation
Obesity
Diabetes mellitus
High blood pressure
Heart disease

Aside from this it does cause anxiety and depression.

I did write an article on insomnia, and got a lot of positive feedback from it.

All the best,
Michael

Put it this way I attending a corporate staff session last year on the subject of "are we sleeping enough", the speaker asked the room to put their hand up if they had a problem sleeping. 99 per cent of the room put their hand up !!

Did you also know that the only time the body's immune system is working at full capacity is when we are in a deep sleep. It is why when we are unwell we sleep a great deal. There are also different kinds of sleep.

I could probably list at least 100 sub niches on ideas for content to do with sleep so with some careful research of low hanging fruit key words you should do very well. Good luck, Phil

There are many kinds of people who cannot sleep well. Keep broader is easy to find keywords to write your posts and help more users. Suppose you focus on one aspect of sleep problems and thus reduce down your visitors. I think you do not want this to happen. It is up to you to make your final decision.