Ache on left top chest only when breathing deeply from chest the deeper, the more noticeable chest ache fine with diaphram breathing no other symptoms?

Probably muscular: Probably musculoskeletal pain, due to muscle tightness or strain. Could also be a more severe cause of inflammation in the lung sometimes issues like blood clot however if not having shortness of breath I would try stretching and icing the affected area. If no relief, I would recommend following up with your primary care physician to rule out something more serious.