I've been having a sharp pain right below my left side of my rib ...what can this be?

It's most likely: Alikelyare muscle strain. No nausea or vomiting, correct? Have u beef exercising hard? Does it increase when u inhale? I'm talking about highest probability, it's unusual to have a disease of an internal organ cause pain at left lower rib cage but the spleen is under there. Have u been sick? It's probably muscle but get checked if worsens.