I believe that you are suffering from heat pimples
. Use a mild/gentle cleanser for face wash, twice daily e.g cetaphil cleansing lotion.
You may use a topical antibacterial e.g clindamycin
or benzoyl peroxide gel just as a spot treatment for active acne during day time.
At night you may use a topical retinoid e.g Adapalene gel, over the whole affected area.