Thanks for writing in.
First, about the thyroid: a low TSH usually is a sign of hyperthyroidism (symptoms: intolerance to heat, weight loss, anxiety and nervousness, palpitations). Check for a low free T3. Occasionally, the T4 does not convert to T3 (activated component of thyroid hormone).
Regarding the finger numbness. An EMG would show any ulnar nerve palsy (which innervates the intrinsic hand muscles and skin over the 5th digit and 1/2 of the 4th digit).
It is important to control the swelling (elevation, compression, and ice) as the swelling may cause some tingling or numbness.
In essence, follow up with the orthopedist and family physician for above considerations.
Let us know how it goes. Take care.
Tom Plamondon PA-C, PT