The pain below the bunion can be considered as toe tenosynovitis, plantar tenosynovitis, etc. The details are as follows: 1, toe tenosynovitis: it may be due to too much toe activity or too much walking, causing friction between the tendon sheaths and tendons, which manifests as pain on the bottom side of the toe; 2, plantar tenosynovitis: as the termination point of the plantar tenosynovitis is at the base of the toe, so when inflammation occurs, the base of the toe will 3, the toe interphalangeal arthritis or metatarsophalangeal arthritis: mainly manifested as local osteophytes, cartilage wear, joint space narrowing, this condition is recommended to reduce weight-bearing walking as much as possible, at the same time can actively perform anti-inflammatory and pain relief treatment and nourishing joint cartilage treatment.