What should I do if I came back from playing in the desert a few days ago and grew a face of acne?

Then don't wear anything or some aloe vera gel to relieve inflammation these days to see if you are allergic to anything. I used to have pimples on my face after staying in a hotel. I didn't dare to paint anything during that time. Later I went to the hospital and said it was a fungal infection. But you'd better go to the hospital dermatology department to check what's going on. I hope my answer is helpful to you!