Grade: 4
Tore thumb ligament on the left hand. Put in a cast for 6 weeks about 3 weeks after the injury.
Calling this one healed as thumb strength and flexibility is back to 90%. Pain is only when fully stretched and is slight.
Cause - Combination of riding too fast on a gravel road and using tires made for rock/mud
Resolution - changed the tires
Rehab - thumb stretches and movement and regular weightlifting