Normally, acne occurs on a background of hormonal imbalance but, depending on their location, they may indicate that you have hidden conditions.
So:
-if you have acne on the forehead then, your intestines are suffering,
-if pimples appear on your cheeks then your lungs are affected,
-pimples located on your nose indicate heart diseases,
-your kidneys have problems if you have pimples on your jaw,
-if you have pimples on your back then you have problems with digestive tract and lungs,
-acne around the mouth indicate problems with reproductive organs.