Hi there,
You did not provide your daily routine.
If you carry heavy weights or exercise with a wrong way you can face these type of problems.
Next Steps
1. Apply Narayan tail (oil) gently on the affected area
2. Pour a little hot water on the affected muscles.
3. Dry the arm and apply smooth cotton bandage, not very tightly on that for few hours
Health Tips
Don't sleep on that side
Have Ayurved consultation if it is Paining
Take care: )