Buerger's disease is a rare condition characterized by inflammation and blockage of blood vessels in the hands and feet. It is caused by an autoimmune reaction triggered by tobacco use. The disease most commonly affects middle-aged men who smoke or use smokeless tobacco. Symptoms include pain, numbness, skin ulcers, and gangrene in the extremities. Diagnosis involves ruling out other conditions and detecting blockages using angiograms or ultrasounds. The only effective treatment is permanently quitting tobacco. Without quitting, limb amputation may be necessary to prevent infection or gangrene.