Commonly occurring finger injuries are due to recreational and occupational accidents such as mallet fingers, boutonniere deformity, trigger finger, swan neck deformity, dislocation and fracture. Other common injuries occur among basketball, foot ball and baseball players. Osteoarthritis, rheumatoid arthritis may cause deformity of hand and fingers. Sprains and strains : Strains occur when muscle or tendons are overstretched. Sprains are an over stretching or a partial tearing of ligaments. Flamingo Frog Splint gives you a great relief.