I have read some of these cases , but I have a question to anyone.I am 50 years old and in some good physical condition ,I carried a bike up the stairs, I always do.
But the other day I felt I pulled something around the waist that made me stop for a min carring the bike up .
Two days later I notice I had a slight bump around my waist on the left side with some pain.
No diahrrea,no vomiting, no constipation, just unconfortable.
Went to the doctor and she felt nothing.Just told me to go home and take it esy, and in 2 weeks will go away.
Just want to get someone's input.Does is it sound like something related to bms?
Does anyone experienced this before? 
Thanks
woops