I had acne problems. I ended up having to change my facewash after treatment. I was told chemo can change your body's chemistry.

I can relate. I finished chemo 12/10/15, started Tamoxifen on 2/18/15 and my face is a mess. It was very clear and smooth the whole duration of chemo. I'm not sure if coming off chemo or going on Tamoxifen is causing the problem but it's frustrating. I haven't figured out a fix for it yet though...

Huh, my skin cleared up. I finished chemo this past thanksgiving, and could count on one hand how many pimples I've had since then. During the first few rounds I would get big gnarly ones on my chin and around my eyebrows.

No but i have read that it can cause acne.