Could it be hormonal as well? Definitely worth seeing a gp to see and start with basics!

I had to visit a dermatologist for a prescription. Roaccutane was the brand. Once a day pills. Cleared my acne right up

If the breakouts are really bad it might be worth mentioning it to your GP next time he visits as depending on the cause the GP might be able to give him something to help
Apart from skincare products make sure that you are changing his pillowcase, face washer and towels often as the bacteria love to build up in these things.

My teen boys use Azclear foaming cleanser in the shower. Works great and doesn’t dry out the skin. They get the occasional pimple but no acne. I’ve heard that products that contain azelaic acid are really good.

I use Khiel’s for my skin and my daughters skin and i love their products. Although i have never tried the male products I am sure they are just as fabulous as the ones i use. They offer samples too and can be found at Sophera where they can give you sample to try first.