I have had excellent success clearing my skin using coffee enemas. It may not work for everyone but I used to get these bumps on my forehead and on my face, not acne, but something similar. After about 3 CEs my skin cleared up tremendously and has remained very clear. According Dr Wilson an expert on CEs one of the benefits of coffee enemas is:

"Improving the skin. The body must eliminate poisons somehow. If the colon is not working well, the body must use alternative elimination channels. One of these is the skin. This causes skin eruptions including dermatitis, acne, eczema, Psoriasis and perhaps other types of skin eruptions. The skin must compensate for inadequate elimination through the liver and colon. coffee enemas assist the skin by restoring elimination through the liver and colon."

If you have liver/gallbladder congestion, and no other maladies, then it will most likely work in clearing your acne. you have to find out what else is wrong with you. most likely, you have some degree of heavy metal toxicity, and/or gut dysbiosis. You have to clean up/heal your gut and detox the metals. That combined with Liver Flushing should at least make some improvement.