What should I do about my split and tearing fingernails?

My nails are weak. I want to get a manicure, but they keep splitting and tearing, so they stay short and stubby.

My fingernails are torn and separated, so they are causing wounds when I scratch my skin.

I have a question

I'm wondering if it's better to just leave my nails bare without doing anything, or if I should apply a nourishing or strengthening agent.

Which one is better?

Does taking biotin make nails stronger? Has anyone seen results?

My husband tells me to go to the hospital. Has anyone been to the hospital for something like this?

I need your help~♡