In-depth

Symptoms

Fatigue

Headache

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

Runny nose

Runny nose: What's causing your sniffles?

Shortness of breath

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

Unexplained weight loss

Wheezing

Tests and diagnosis

CT scan

X-ray

Aug. 05, 2014