Please don't put on powder and wash it off if you have any on. That can create infection and may have contributed to this reaction. You should ice and use witch hazel or pure aloe vera gel (clear stuff found near sunblock) to calm the area. Redness goes away relatively fast that way. Avoid anything with chemicals.

I'm pretty sure tea tree oil is available on Germany. Look for something with melaleuca oil.

Thanks LaGirl. I did wash it off after I got home from the treatment. Yeah I will look for what you recommend