This could also likely be costochondritis which is when the tissue meets the ribs and the sternum. Costochondritis is an inflammation of the junctions where the upper ribs join with the cartilage that holds them to the breastbone or sternum. Costochondritis is caused by very deep breathing, exercise or any expantion of the ribcage more than normal. This is extrememly common and the way to relieve it is to not exercise until it heals and apply ice or heat, and take maybe some asprin for the pain.
Hi,
Yes loud screaming coupled with excitement can cause strain in the chest muscle.
Rest, ice packs and OTC pain killers should help.
Hi leigh0610, how are you doing? Yes, It is possible to get pulled muscle or strain when you suddenly contract your muscle like sneezing, violent coughing, lifting heavy weight, push-ups and so. Muscle needs to relax and it takes some time. Complete rest and heat locally is very helpful. To counter pain, you may take a painkiller and a muscle relaxant with food for couple of days. Gentle massage and steam bath will be soothing. Take care and share your thoughts.