I plucked my hairline, will it ever grow back?

[Andreas34]

I'm a 25-year-old male with medium-short hair. About ten months ago I was unhappy with how my hairline looked, so I pulled out a large chunk of hair using a knife rather agressively. I have noticed that my hairline has moved back since then and it has become thinner. No bald spots but an overall thinning. My question is: can pulling your hair once cause traction alopecia and is this reversible? Will my hairline return to normal if I never do it again? Thanks in advance.
Andreas

 

[Quantum Cat]

erm, if you cut out the actual follicles then they're gone for good. If you just plucked the hairs then they will grow back

 

[Andreas34]

If you mean cutting out the follicles leaving scars on the skin? No I didn't do that. I just put pressure on the knife and ripped the hairs out. If they will grow back, how long should it take? It's been 10 months now and the plucked area is still thinner than the rest. It looks like it's receding but it's not.