If I see the bleeding icon I use the medkit and it stops the bleeding and draining of health points. Also if they get hit and are not bleeding but their health points are way down I heal them so they can continue the mission without getting killed with another shot. I know a lot of people play and if their soldier gets hit they just go on but I have been playing a while now and I still have almost all the soldiers from my original team and their points are extremely high in every category and they are a great team to send in on difficult missions since all their points are so high. Even psionics on them hardly effect them unless they are hit two or three times in a row.