my gran had this - she had both done (th eones in her forehead) she had lots of staple things in after, but not sure if she had anything else done while she was in. she was in for about 2 weeks i think (shes 83 though)
it sadly didnt solve problem.
why is it you need it done? she needed it cos she kept getting this lump thing in her forhead, with gung in it and it was cos her sinuses were blocked and not draining down so had to be widended.