How can common fitness related injuries be treated at home ? when should medical care be taught ?

Elevate the limb, take ibuprofen
it should be taught from an early age
do you mean when should medical care be sought? if so, it should be sought when there is any excessive swelling, if the color changes more than a normal bruise, if the injury expands outside of the affected area, if the pain gets too bad, and if the pain lingers for a while after the injury