Answer:
There are many ways. Depending on your age and fitness even also your gender.

Aneurisms - blurred hallucination, sudden headaches (usually strong adequate to split your skull), dizziness, loss of body function (slurred speech, vision, movement, numbness, bladder and bowel control, consciouness). This condition is usually diagnosed by highlighted scan (injected radio-active dye and cat scan). Many are not time threatening and have existed since birth.

Heart anticlimax - similar to above but also may involve pain surrounded by the left arm and standard fatigue without exercise. Also, slickly diagnosed with blood test and highlighted scans.

It is also possible that you are suffering menopausal symptoms, dietary deficit, alcohol related symptoms, the flu, food poisoning, diabetes or many of the anxiety related conditions.

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