C.J. Allen Upper Extremity & Hand Therapy serves patients throughout Lake Grove, Centereach and the surrounding communities from our Smithtown office at 290 E Main St. Every therapist here works exclusively on the hand, wrist, elbow and shoulder.
Sports and Overuse Injuries
Hand and wrist injuries are common in sport and frequently underestimated — a jammed finger, a fall onto an outstretched hand, a wrist that aches after every match. Some resolve on their own; others are fractures or ligament injuries that quietly stiffen or heal poorly if left. An evaluation costs little and occasionally prevents a permanent loss of motion.
Conditions We Treat
- Finger and hand fractures, including jammed and dislocated joints.
- Wrist sprains and ligament injuries, including TFCC problems.
- Tendon injuries and repairs.
- Tennis and golfer's elbow.
- Carpal tunnel syndrome and nerve compression.
- Trigger finger.
- Arthritis of the thumb, fingers and wrist.
- Post-surgical rehabilitation.
The 'Jammed Finger' That Isn't
A finger that is swollen and painful days after being jammed is worth having looked at. Some of these are simple sprains. Others are avulsion fractures, volar plate injuries or tendon disruptions such as mallet finger, where a few weeks in the correct orthosis produces a normal finger and no treatment at all produces a permanently bent one. The two are difficult to tell apart without an examination.
Custom Splinting, Made On Site
Orthoses are fabricated here and molded to your hand. For finger injuries especially, precise positioning matters enormously — a few degrees of difference determines whether a tendon heals at the right length. We remold as swelling changes rather than sending you out with a splint that fits week one and nothing after.
Returning to Activity Safely
Getting back to sport, work or an instrument is the actual goal, and doing it too early is how re-injury happens. We progress loading deliberately and test readiness against what you are returning to rather than against a calendar date.
Arthritis and Everyday Function
For older patients, thumb and hand arthritis is among the most common reasons to come in. Joint protection technique, a well-made orthosis, adaptive tools and targeted strengthening can meaningfully reduce daily pain and preserve independence with jars, keys, gardening and handwriting.
Your First Visit
A full evaluation of motion, strength, sensation and swelling, plus a specific account of what you cannot currently do. From that we build a plan with a realistic timeline and a home program that fits your actual week.
Adolescent and Pediatric Hand Injuries
Growing hands are not small adult hands. Fractures near a growth plate need different handling, and a young athlete keen to get back on the field often needs the timeline explained more than once. We work with families to make sure protective splinting is actually worn and that return to sport happens when the tissue is ready rather than when the season is.
Preventing It From Happening Again
Finishing therapy without changing what caused the problem is how people end up back a year later. Where technique, equipment, grip mechanics or training volume contributed, we address those directly — racquet grip size, handlebar position, keyboard height, how long you go between breaks. It is a small part of each visit that materially reduces recurrence.
Your Home Program
Most progress happens between appointments. We prescribe a short, specific set of exercises rather than an overwhelming handout, check your technique each visit, and advance it as you improve.
Getting Here From Lake Grove
Take Route 347 (Nesconset Highway) west toward Smithtown; our office is at 290 E Main St, Suite 400. The drive is typically ten to fifteen minutes from the Smith Haven area. Our Hauppauge office on Joshuas Path is a similar distance if it suits you better.
Appointments
Call (631) 761-6996 or request an appointment online. Most insurance accepted — our team will assist with insurance verification and help coordinate your care.