In-depth

Symptoms

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?

Snoring

Snoring may be just a nighttime annoyance, or it may indicate a more serious health condition. It can also disrupt your life and relationships.

Tests and diagnosis

Allergy skin tests

Itching, sneezing and swelling: Find out what's causing your allergy symptoms.

CT scan

A CT scan is an imaging test that uses X-rays to produce detailed images of the inside of your body.

MRI

MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

Mar. 08, 2014