Can the cause of cystitis be the build up of overwhelming stress and tiredness?

Yes, stress and a lack of sleep can certainly have an impact - this can affect your immune system for one, is thought to often be a major contributing factor in cases of interstitial cystitis, but stress may also have an impact on other factors; on your diet, for example. 

Hopefully some of the tips throughout our webpages prove useful. We have lots of advice on stress, and a remedy such as our Stress Relief Daytime may be useful for you but if you have any other questions please don't hesitate to get in touch.