The protrusion of the bones on the inside of the foot generally refers to the protrusion of the first metatarsophalangeal joint of the thumb. If the metatarsophalangeal joint protrudes at an angle of deviation of less than 15° and there is no discomfort, it is a normal physiological phenomenon, while an angle of deviation of more than 15° is abnormal, which is also known as a bunion. Mild bunions can be corrected by wearing loose-fitting shoes with arches in the middle, and by practicing foot gripping movements with split-toe socks and split-toe pads. Severe bunions, which can affect daily walking and present localized symptoms such as redness, swelling, heat and pain, require minimally invasive or orthopedic surgery to correct. In daily life, it is recommended that you choose comfortable and breathable shoes with soft and hard soles that fit your feet, avoid wearing high-heeled and pointy shoes, and avoid walking for long periods of time to prevent the occurrence of bunion, and if a bunion occurs, it is recommended that you seek medical attention in a timely manner and standardize treatment under the guidance of a doctor.