[Question] How should contact dermatitis be managed?

I tend to sweat a lot, so in summer I sometimes develop symptoms similar to atopic dermatitis, but as I got older, those symptoms disappeared. However, for the past few years, contact dermatitis has worsened significantly, and I'm worried...

For example, I make sure to donate blood every two months, but even after removing the needle and sticking a bandage on the area, it gets red and itchy for about two hours. It remains swollen and red for over two weeks. I keep applying Atopy Barrier, an atopic dermatitis cream, diligently, and it finally gets better.ㅜ.ㅜ Also, the photo below shows the area where I wear my watch. As you can see, that area also gets sweaty, turns red, and becomes very itchy lately. Since I keep wearing the watch, it doesn't heal...

My wife says it's because she's getting older, but should we go to the hospital for a check-up? Or if you have any good ointments, please recommend them~ I'm hesitant to go to the dermatologist because there are too many people and the waiting time is long...