In reply to Chauvi:
Bad luck!
As a youth I suffered from repeated ingrown toenails on my right foot. I had the nail removed (as described above)about four times but it never got any better.
I went into hospital (two nights!)and they removed the nail bed in an effort to stop the nail from growing again. This certainly cured the ingrowing nails but unfortunately they made a real mess of my toe. They didn't remove all of the nail bed and I still get "odd bits of nail" growing on my toe which now looks deformed!
I didn't start climbing until several years after the operation so I'm pleased to say this has never interfered with my climbing.
My advice would be to see a chiropodist who is likely to know more about this than your average GP.
A friend of mine who is both a climber and a chiropodist took one look at my toe and burst into laughter.
Hope this helps.