A substance found in many foods, including turkey, can suppress an overactive immune system, researchers are reporting.

Psoriasis is caused by an overactive immune system that speeds up the growth cycle of the skin.

The primary mechanism of the damage is an overactive immune system that seems to target the patient's own body.

Methotrexate can suppress an overactive immune system and slow or stop joint damage.

Most often, it's due to an overactive immune system.

An overactive immune system, bacteria, or viruses can be responsible.

An overactive sympathetic nervous system, leading to increased stress responses.

The sweating results from an overactive sympathetic nervous system, although doctors are not sure of the underlying cause.

In rheumatoid arthritis, an overactive immune system targets joints and other areas of the body.

Cannon attributed the ultimate cause of death to an overactive sympathetic nervous system.