knee pain

hi! for a little while now i have had pain in my right knee on the outside part, going down towards my ankle. it hurts most practices, but is triggered by certai things most, mostly front handspring front tucks. when it happens its not lasting, but for a few minutes it realy hurts then feels ok...

when ever i bend my leg i get a pain in my knee and its hard to bend because it hurts, i dont know what it is but does anyone know what might help?