Is the hair loss treatment really effective for split ends on the crown of the head? I'm also curious if the procedure takes a long time!

Maybe it's because I've been under a lot of stress lately, but the amount of hair falling out every time I wash it in the morning is insane. My hair is already on the thinner side, but lately I can see the gaping thinning at the crown of my head, and I feel like crying every time I look in the mirror.

I felt I needed hospital treatment before it got worse, so I looked into it and was recommended hair loss treatments. I am wondering if I can really see my hair becoming thicker again. As a working professional, I want to squeeze in some time after work to receive treatment. Could you tell me how long the total treatment time typically takes when visiting a clinic for procedures like injections or laser treatments?

Since it is done directly on the scalp, I am worried about whether the pain will be severe, and whether I can resume daily activities or wear a hat immediately after the treatment. I look forward to hearing real feedback from those who have already experienced this to see if starting this hair loss treatment at the early stages, like I am, will definitely help with prevention!