Hello,
Thank you for your query at DoctorSpring.com
I have read your query with diligence.
After reading your complaints and looking at picture it looks that there is rupture of long head of biceps muscle.If it is not painful then it is treated conservatively but as it is painful and taking joy of your life so you may ask for surgery.Yoo should have a MRI of your arm.This will confirm your diagnosis.In this case a orthopedic surgeon should be consulted for treatment.
Feel free to discuss further,
Hope this will help you.
Regards.