Am not raised heavy bags.

But within a few month hurt a hand from a shoulder to elbow, as not strong hurt, but constant, am not over load hand and not raised heavy items.
A reasons are different, as tiredness of muscles or tensions straining, these aches are faster removing, and shoulder aches is hide fracture, when damage side is loaded, maybe you having tenditis is biceps tension inflammations, is a rubbing bone in bone  with tension, if breast hurt and irradiates in left hand this is  heart attack, thus call for cardiologist, if hand hurt from a shoulder to elbow is neck vertebra pathology, thus neurologist  will advice MRT test for neck spine side, but if ache rising on the mobility ,thus osteochondrosis of breast side probably having, thus neurologist will help you.And other is epicondilitis is muscles inflammation in edges of fixing theirs to elbow joint.And cure is full rest for hand, as a position for hand and vertebra is comfortable and not bended, and if ache having in injury or over loading thus help ice compress.