I have a lot of pimple what I have to do?

Salicylic, benzoyl p. You could use over the counter products containing salicylic acid such as mural. However if it extensive or sever you need to see dermatologist for prescription creams and possibly oral medications. Deep cysts untreated can lead to scarring.
Acne. Try to find an acne wash system like neutrogena or something with benzoyl peroxide. Following low sodium diet might help too, since acne-causing bacteria like salt. You can try to prevent spreading bacteria onto your face by not touching your face, washing your phone, etc.