Acne vulgaris.(pimples)
It's physiological response to your harmonal variations, there is nothing like one time treatment, you need to maintain with good cleansing lotion topical application cream, check for any harmonal abnormals especially after 22 yrs...may be pcos. Avoid on counter cosmetics, balance your stress & sleep cycle, avoid high glycemic foods(Jung).
Next Steps
treatment depends on the different grades of acne. so meet the near by dermatologist for further treatment and evaluation...can be treated systemically, chemical peels & topical application..etc