This is likely to be purging.
You should also follow a good skin care regime.
At night, first clean your face with soap and water. You can also use a facial cleanser such as:
CeraVe Foaming Facial Cleanser for Normal to Oily Skin. ...
ProactivMD Ultra Gentle Face Cleanser
Apply an astringent. You can use:
THAYERS Original Witch Hazel Astringent with Aloe Vera
Solimo Deep Cleaning Astringent
Lastly apply the moisturizer.
Follow this every night. This will help you greatly.
Of course these brands are for reference only, you can discuss different brands with your pharmacist or cosmetic shop assistant.