Further, have you ever tested yor blood sugar
when you skip a meal? If not, you may get low blood sugar
when you get that. When my blood sugar gets low, I have gotten shaky, a headache, etc..
When it comes to drinking, if you don't drink enough water, you might develop a case of orthostatic hypotension, where your blood pressure drops when you stand up and your vision can blur.
Not getting enough sleep can make your cognitive functions not do as well.