Hand Therapist Nigel Chua 
A crushed fingertip’s bone usually heals in 3 to 4 weeks with a small splint. The nail decides the long-term result: drain a throbbing black nail early, and get a split, lifted or missing nail checked the same day for nail bed repair.
A broken finger usually takes 6 to 12 weeks to heal, with 3 to 6 weeks of protection in buddy tape or a splint. Before any of that, make a loose fist: a finger that crosses its neighbor means the bone is rotated.
Intersection syndrome is inflamed tendons 4 to 8 cm above the wrist on the back of the forearm, often with a squeak you can feel. Most settle in 2 to 6 weeks with a splint and a change of load.
ECU tendonitis is an overloaded tendon on the little-finger side of the back of the wrist, and most settle in 6 to 12 weeks. If the wrist snaps when you turn your palm up after an injury, a cast in the first few weeks can heal it without surgery.
Kienböck’s disease is the lunate, a small central wrist bone, losing its blood supply and collapsing, usually in a 20 to 40 year old with no injury. Early X-rays are often normal; an MRI finds it, and the stage decides whether the bone can still be saved.
SLAC and SNAC wrist are arthritis that follows an old injury: a missed scapholunate tear or a scaphoid that never healed. The wear follows a predictable route, and each stage it passes closes off one of the surgical options.
Gymnast’s wrist is a stress injury to the radius growth plate from weight-bearing on bent-back wrists. It needs a full stop on hand weight-bearing for at least 4 to 6 weeks, often 3 months if the X-ray has changed, then a staged return.
Little league elbow is growth plate irritation on the inner elbow of a young thrower, and most children are back throwing in 6 to 12 weeks if it’s caught early. Outer elbow pain, catching or a sudden pop needs a doctor, not rest.
Partial UCL tears in throwers often settle with 6 to 12 weeks of no throwing and a graded return, about 3 to 6 months in all. A complete tear in a pitcher usually means Tommy John surgery and 12 to 18 months before competitive pitching.
An olecranon fracture takes about 6 to 12 weeks for the bone to heal and 3 to 6 months for full strength. Whether you can straighten your elbow against gravity decides splint or surgery.