There are several possible causes of bunion pain: first, gout, most patients with gout have pain in the joints of the big toe as the first symptom, often accompanied by skin redness and swelling and increased skin temperature, and in severe cases, gout stones may form. Third, infection or tuberculosis, when the bones and soft tissues of the big toe have infection or tuberculosis, the pain of the big toe can also appear, often accompanied by redness, swelling and pain of the skin, then the relevant blood tests and toe x-ray, nuclear magnetic examination for diagnosis and treatment.