My hair is gradually thinning. Could this be the early stage of hair loss? I am concerned about which treatment is effective.

I've been really worried lately because it seems like my hair has thinned out noticeably compared to before. I didn't used to worry much about it when washing and drying my hair, but at some point, it felt like a lot more hair was accumulating in the drain, and seeing the hair on the floor after blow-drying makes me feel anxious for no reason. In the past, my hair felt thick even when tied up, but now it seems like the amount that can be tied has decreased to the point where I have to wrap a hair tie around it one more time.

In particular, the crown of my head feels thinner than before, so I get really self-conscious when taking photos or standing under bright lights. My bangs aren't as voluminous as they used to be, and the overall volume has dropped, making me feel like I look older. People around me say they don't notice, but since I look in the mirror every day, even small changes feel significant to me.

I have tried switching to a functional shampoo for hair loss, getting scalp massages, and taking supplements, but I haven't noticed any significant changes yet. I want to know exactly if this is due to stress, aging, or some other cause. I am also curious if examining my scalp could help identify the cause to some extent.

I've heard that managing hair loss in its early stages is important these days, so I'm considering consulting a hospital or dermatologist. I searched online and found there are so many types of treatments, such as scalp scaling, medication, injections, and scalp procedures, but I'm not sure which one would be helpful for someone like me whose hair is gradually thinning.

Has anyone else received treatment at a clinic for thinning hair like I do? If you have seen any effective procedures or treatments, please share your experiences. I am also curious whether it is advisable to start with an examination, or if my condition can improve simply through lifestyle changes and nutritional management. It would be very helpful if you could also let me know the cost, duration of treatment, and whether the pain is severe. I want to manage my hair properly before it is too late and regain the fullness of my hair like before.