The symptoms of swelling and pain in the bunion joint of the foot are commonly caused by the following: 1, caused by acute injuries, including contusions, pressure smash injuries of the thumb, or tighter shoes during strenuous exercise or long-term walking, resulting in corresponding extrusion injuries, which can lead to local swelling and pain; 2, commonly seen in women with bunions, due to bunion deformity, which can lead to subluxation of the first metatarsophalangeal joint, during When exercising or moving, the joint alignment is not good, which can easily lead to injury arthritis, resulting in swelling and pain; 3, often seen in middle-aged men, who do not pay much attention to daily food, eat meat and drink alcohol, which can easily lead to gouty arthritis, and accordingly can lead to redness, swelling, heat and pain in the thumb joint. Patients are advised to go to the hospital for detailed examination and clear diagnosis.