I wore new clothes for the first time in a while without washing them, and now the area around my neck is red and itchy.

I recently bought a shirt I really liked from an online store. I was so eager to wear it that I felt too lazy to wash it, so I just put it on when I went out yesterday. When I woke up this morning, I noticed that the nape of my neck and the area around my collarbone, where the shirt collar had been touching all day, were red and had tiny, stinging blemishes popping up. My skin is quite sensitive, so I'm upset because it seems like the irritation was caused by contact irritants from the fabric processing left on the new shirt. As a consolation, I quickly put the shirt in the washing machine and am applying a generous amount of mild soothing gel to my neck. Everyone, please make sure to wash your new clothes before wearing them, even if it's a hassle.