I'm afraid to look in the mirror these days. Do I have sensitive skin?

These days, every time I get home from work and look in the mirror, I'm startled. I used to hear a lot of compliments about my skin, but now, even the slightest fatigue or a change in the weather makes my face flush. I'm worried that this might be the sensitive skin I've always heard about.

Even when I put on makeup in the morning, it doesn't go on as flawlessly as it used to, and it often feels like it's just sitting there, which is frustrating. Especially around the change of seasons, my skin stings and reacts to even the slightest irritation. Even when I try products that are supposedly gentle, my sensitive skin still struggles to calm down. When I was younger, my skin seemed to be smooth even without much care, but I'm not sure if it's because of the environment or my constitution that's changed over time. From now on, I really need to pay close attention to the ingredients and start over again.

Has anyone else, like me, suddenly developed sensitive skin and struggled with it before overcoming it? I'd love to hear your advice on what skincare methods or routines have helped.