Kiera Blooming Hair Essence Foam

I've been using a hair tonic consistently for a few years now, but this is my first time trying a foam type, so it was quite fascinating. At first, I didn't know how to use it properly, so I pumped it into my palm and massaged it into my scalp, but it turns out this product is meant to be applied directly as a foam onto the scalp. With one pump, a coin-sized amount of airy, bubbly foam comes out that absorbs into the scalp, giving a slightly tingling sensation. And while the scent seemed quite faint when applied to my hair, when I brought it close to my nose, I could detect a subtle floral fragrance.

I'm not sure how much I should be using, so I've been pumping it once on the crown and once on the temples, gently massaging it in before shampooing, but I'm not sure if I'm using it properly. I do want to apply more, but since I paid over 60,000 won for the 50ml bottle, it feels too precious to use generously. The spray type might have been easier to apply all over the scalp. It worked fine on my wet hair, but when I used it on dry hair, I felt like there was an oily residue, possibly due to the nourishing ingredients. And considering the high price, I haven't noticed any significant effects yet, so I'm not sure if I'll repurchase it.

For the first 3 months, I used it well after repurchasing, but suddenly after that, my scalp became irritated and later it itched like crazy. I checked and there were no incompatible ingredients, but still... First, I got a prescription from a dermatologist and took the medication, wondering what the problem was - the shampoo? this product? something else? I tried not using them one by one, and when my condition got better, I tried using it again, but this would make my scalp sting again... so I ended up not being able to use it.

I wrote about it above. ㅡㅡㅡㅡㅡㅡㅜㅜㅜㅜㅜ