He should also avoid touching his face unnecessarily, as this will result in more dirt accumulating on his face and cause pimples to form.
 

In addition, he should maintain a good diet and avoid eating too much deep-fried food. Opt for more fruit and vegetables and drink sufficient water to help flush out the toxins from his system.
 

To speed things up, you can also get him ~H2O+ Anti-Blemish Calming Corrector, $56. It helps treat breakouts, post-acne marks, combats excessive sebum production and reduces skin redness.