According to the national institute for mental health estimates that to % of all doctor visits are for stress-related illnesses.

70 to 80%

Explanation:

The national institute for mental health(NIMH), understand the stress issues and prevent them on the basis of researches.  

When the stress become constant and chronic, then it will cause a serious health issue. Stress related illness increases the risk of mental and physical health. Stress will causes a serious problems as follows:

Thus, 70 to 80% doctors deals with cases of chronic stress.

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