In-depth

Causes

Lyme disease

Lyme disease is a tick-borne illness. Left untreated, it can lead to serious and lingering complications — including arthritis.

Prevention

Childhood vaccines

Vaccines for adults

Symptoms

Headache

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

Tests and diagnosis

X-ray

Mar. 19, 2013

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