Pimples on you scalp are a result of bacterial over growth in the hair follicle. Very few products get deep enough into the hair follicle to remove the debris that the bacteria hides under and feeds off of.
The follicles offer bacteria and fungi the perfect feeding and breeding ground because most hair simply add to the amount of bacteria. This is because they do not deep cleanse and secondly the leave behind residue which attracts dirt and more debris to the hair follicle itself!
To get rid of scalp acne or bumps you must have a shampoo that will start by opening up the hair follicle opening so that it can be irrigated of existing bacteria. Secondly the current fungi and bacteria must be washed out and destroyed. Thirdly the ph of the scalp must be reset to prevent overgrowth of fungi and bacteria in the future. The products that do this are Zincplex Shampoo, Conditioner and Scalp Lotion!