What type of joint is primarily affected by bunions?

The first metatarsophalangeal joint is primarily affected by bunions, which are characterized by a bony prominence that develops at the base of the big toe. This condition is often the result of misalignment and structural changes in the foot, particularly affecting the joint where the first metatarsal bone connects to the proximal phalanx of the big toe.

Bunions cause the big toe to angle towards the second toe, leading to pain, inflammation, and difficulty in wearing shoes. The associated discomfort typically arises from the mechanical stress placed on the first metatarsophalangeal joint as it becomes misaligned and may also lead to soft tissue irritation around the joint. Addressing bunions often involves focusing on this particular joint through orthotic interventions or surgical correction, highlighting its significance in the pathology of this common foot condition.

Other joints, such as the ankle joint, subtalar joint, and midtarsal joint, may not experience the same level of direct impact from bunions, as they play different roles in foot mechanics and movement.