The pain in the index finger of the right hand, i.e., the index finger, may be caused by tenosynovitis, gout, osteomyelitis, dactylitis, trauma and so on. 1. Tenosynovitis: If the pain in the right index finger occurs in the part of the joint, there is a ringing sound in flexion and extension activities, it may be stenosing tenosynovitis of the flexor muscles of the fingers, and there is usually a hard nodule in the local area, and the activities of flexion and extension of the fingers are limited. 2. Gout: if the right hand finger pain occurs suddenly, in the joint area, and accompanied by redness, swelling and fever, may be gout, need to test the uric acid to clarify. 3. Osteomyelitis: there will also be pain in the digit, localized redness, swelling and fever, and elevated white blood cells and C-reactive protein. 4. Fingertipitis: usually caused by onychomycosis or soft tissue infection, the finger belly pressure pain is obvious, some will have redness and swelling. 5. Trauma: when the right finger suffers from direct or indirect impact, it may cause soft tissue injury or phalangeal fracture, which requires medical examination and imaging examination for clear diagnosis. Therefore, there are several reasons for the pain in the right finger, if the pain is severe, you need to go to the hand surgery department of the hospital to have a look.