i suffer with this on one of my thumb nails - when they grow and ive took my enhancements off - i cuddle this thumb - in the hope that it will stay intact - but no - not a chance - i have to file this nail right down - before i can apply new enhancements - this type of damage is due to matrix damage, (i could be wrong here, but someone will put me right on it - but im sure im right) so it will never be "normal" boo hoo.
hth
the text below is what was answered to me (courtisy of Debs) when i asked this question
Sounds like lamellar dystrophy. Repeated traumas to nail tips, or repeated saturation or drying out by removing natural oils from constant use of solvents.
I reckon you should give your nails a break from extensions for a while and keep them topped up with plenty of oil, and regular manicures and of course protect them by wearing gloves especially when immersing in water. A good nail hardener without formaldehyde.