It always arrives in about 5-7 days for me. You will have to order some of the eye lash cream because you can't put zz on eye lashes. It will burn your eyes. Your son needs to be psychologically prepared for the fact that is is the critters dying off that causes the pimples. And when you apply zz to your face they start dying off by the dozens. So your Acne will get much worse temporarily. My face looked like road rash for several weeks. Then it went to just a few pimples. It took about 6 weeks to see significant improvement. Then I only had 2-3 pimples for about 10 more weeks. Then it cleared. The problem I've had is that people are so happy to see my face clear they want to put their cheek on mine when they greet me. And when they do that, I almost always have itching bumps on my cheek where they touched me the next day. So I have to treat them for a few days. The stuff is rather expensive and the only complaint I have about it is how little you get for the money. If you don't put a few drops of water in it and apply it watered down, it will barely last you two weeks, so it pays to order the package deals and buy as much as you can afford, since you will likely need to use it for the rest of your life, as those darn mites will hop off other people and get on you.