41. What To Do When You Feel Headache and Darkness

If you feel headache accompanied by losing your eyesight (the world is getting darker swiftly), it is a sign of low blood pressure. Sit down quickly, or squat just where you are, or the nearest safe place that has railings, so you won't get hurt when you lose balance and fall to the ground. You'd also need one or two glasses of warm water and a deep breath. Then, eat half-portion or one portion of meal to recover.

See also: When You Feel Headache After A Day Under The Sun