Hands locking up could be related to rheumatoid arthritis, anxiety, or trigger finger, especially with stiff thumb and finger pain. Find more causes here.
Why Fingers Lock Up: 6 Causes (With Trigger Finger)
What Is Causing My Trigger Finger or Thumb To Lock?
Hands of People With Diabetes More Often Affected by Trigger
Do Not Ignore Trigger Finger
Trigger Finger: Causes, Symptoms, & Treatment
Trigger Finger Release Surgery: Types, Procedure and Recovery
Trigger Finger – Common Problem, Simple Cure
Top Causes of Cold Hands
Tingling, Pins and Needles, Paresthesia Anxiety Symptoms