What can cause left side stomach pain upper near beginning of ribs and lower under beginning of ribs?

GI spasms?: "stomach pain" can be caused by lots of things & may indeed originate outside the GI tract. Further evaluation is in order before anyone can answer "what to do." your doctor will want to re-examine you as well as know the quality, timing, duration, location, & associations (eating, position, activity, stooling, urinating) of your pain to better direct the next appropriate testing.