i have a hip problem now cannot walk more than few steps with aid of stick but went to a local hall for a talk from local u3a group. If you dont know about u3a then find your locall group and join.
Talk was about the tectonic plates of the earth. Met the other members and had a quick drink of water, Idont drink tea or coffee . Came home and sat down with glass of milk and biscuit , then i had the most sharp pain under my right shoulder blade . It persisted in waves . Took breath away
So googled this and found advice there. From gog tot o A&E to wait if it persist for up to 6 weeks before getting help ! Not much good . No help at all but sat in easy chair and drank the glass of milk while thinking about it
---- And then the pain stopped just like that . Found that insuffificient liquid intake could cause that pain -there in back under shoulder blade. ItI hasnt returned so far. Didnt know that.