it means you have cancer
Repost and tell us the 'right side' of what. Head, knee, eye, foot, etc.
I don't know but you should take a salt tablet
Many things such as: 1) Costochondritis 2) Torn/pulled muscle between the ribs 3) Heart Attack 4) Pulmonary embolism 5) Broken Rib
possible broken rib
If you eat just before excersicing you can have what you described. Otherwise I don't know...