I finally found the cause at Dongdaemun-gu Pureunbom Oriental Medical Clinic!

I suddenly started getting hives frequently, but I don't know why. It was so itchy that I was going crazy. I also got frequent headaches, but I don't know the exact reason, so I think I suffered for a year.
I think I went to a dermatologist and another oriental medicine clinic.
They said it wasn't all the skin diseases I suspected. After getting antibiotic shots, things would get better, but then they would come back. They said it might be a problem with my immune system. They couldn't figure out why, but I was feeling unwell. Since it was close to my workplace, I ended up coming to Pureunbom Oriental Medicine Clinic. I was halfway giving up, wondering if it was a problem with my immune system. But after listening to my symptoms, pressing on my stomach and checking where it hurt, they said my liver was swollen. They always didn't know the exact cause, but it felt so good. I got moxibustion and acupuncture. It still hurt, but I felt a little better, so I go every day. It's great. ^^