Angliholic
Ache sends a message of a dull pain, "be sore" an irritation feeling, and how about "be in pain?" How should I interpret "be in pain?"
Physically, 'be in pain' expresses a feeling we have when part of out body hurts.
To describe a degree of pain, we use words such as: dull, excruciating, mild, nagging, severe, sharp, shooting.
Unless we witness the pain one is suffering with, 'be in pain' lacks the degree / intensity.
Sorry! That the best that I can share with you.