Hi
Welcome to the MedHelp forum!
In Dequervain's tendonitis there will be redness, swelling and pain on the thumb side of wrist. If this is the case then diagnosis is almost confirmed. Diagnosis is further confirmed by Finkelstein test: A fisted hand is bent towards little finger causing immense pain. If splint, rest and anti-inflammatory are not helping then you will have to opt for surgery.
Other differential diagnosis would include carpal tunnel syndrome, osteoarthritis, rheumatoid arthritis, or gout of first metacarapal-phallengeal joint. Take a second opinion and see. An X-ray of the thumb joint, MRI of thumb and wrist, RA factor, thyroid panel, clinical examination, etc will be required for a confirmed diagnosis. Consult an orthopedic specialist. Take care!
The symptom,s you describe are exactly the same as mine!!! i saw my g.p who told me i have a "Trigger thumb" it is very painfull and annoying if it carry,s on he has offered to inject the thumb which will help goodluck