Can Physical Work Cause Pain In Shoulders And Arms?

Dear Doctor, I am 62 years old 6' and 78 Kg wt active and sports person.

For the past 20 days my rt shoulderis giving me knawing pain.Stretched rt arm lifting straight up is painful. shoulder rotation is some what ok. Pultis /massage/hot tratment does not fetch any relief. No servical problem.

I did little digging in the kitchen garden the day I got it. pl advise.