Gout commonly affects the big toe because it is the farthest from the heart and the coolest part of the body. Gout occurs when the body has too much uric acid, states The Achilles Foot Health Centre. Uric acid is sensitive to temperature change, making the cooler joint a target.
Uric acid is normally present in the blood and is eliminated in urine, states Austin Food and Ankle Specialists. When gout occurs, uric acid builds up and crystallizes in the joints. It is often a hereditary tendency. Gout can attack any joint in the body and is not limited to the big toe.