Weakness in chest
Doctor Answers (2) on Weakness in chest
I can understand your concern.
The twitching of your thumb is absolutely normal if it occurs once in a while. It happens to many and you need not worry about it.
However, i havent been able to understand the part of contraction. Thereforeni would suggest you consult a general physician in person for further evaluation and management.
Dr. Anil kumar jain.