wisdom tooth

was trying to figure out if this is a wisdom tooth.
it was a bit irriating lor.

quite a few things to consider.
1) to pull or not to pull
2) neccessarity of pulling (pain or not...)
3) cost of pulling (i very poor 1 u know...)
4) duration of MC and cant speak... (i more interested in singing than talking)

i told my sec sch friend abt it. u know wat he said?
"u this type of ppl also have wisdom tooth ah"

wat type of word this is?

there are reports are wisdom tooth grow when in late teens or early twenties...
this means wat?
我长不大
cos i now late twenties...