I get a small tear/cut on the left side of my labia right by my **** sometimes after sex or a strenuous work out. My labia are rather large and extend outward of my vagina. It is uncomfortable when my clothes rub against the irritated spot and it hurts to wipe. It never blisters or oozes anything, but is red and sometimes puffy after being active all day. It heals within days. Is this just a skin irritation or should I be worried?