My skin is really dry from the inside, maybe because of the air conditioner. Would a skin booster be right for me?

It’s summer and the humidity is high, but why is my skin cracking so badly? ㅠㅠ Lately, I’ve been exposed to the air conditioning directly every day at the library and the cafe where I work part-time, so my skin has become the worst kind of dehydrated oily skin—oily on the surface, but tight and feeling like it’s going to tear inside.

No matter how thickly I apply the cream, it just sits on the surface and doesn't address the inner dryness at all. Perhaps due to the lack of moisture, I feel like the fine lines around my eyes have suddenly increased significantly, which makes me feel so depressed.

It seems like cosmetics alone aren't enough to solve this extreme inner dryness, so I'm thinking of trying a skin booster for the first time. Would getting an injection like Rejuran or Vitaran at Maypure really replenish my moisture? I'm a bit scared because there are so many reviews saying the pain is intense, but please recommend a treatment that is a surefire way to treat inner dryness!