Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.


Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.

Nausea and vomiting

Shortness of breath

Shortness of breath can be frightening. Most of the time, a heart or lung condition is the cause.

Tests and diagnosis

Chest X-rays

CT scan

Lumbar puncture (spinal tap)

Jan. 02, 2014