Cutting a lifted toe nail - yes or no?!

[Cowsaregreat]

I have psoriasis under 2 finger nails. Luckily for me 1 has cleared up (mostly) but my thumb nail is tough as old boots and I keep it short so I don’t catch it. I now have psoriasis under one toe nail. It’s lifting off and I’m unsure whether to cut it right down as far as possible as it sometimes catches on my sock. It’s only lifting on the left side but it’s nearly down to the bottom and I’m concerned it’ll get ripped off and that’ll hurt! Can anyone advise please.