You are not supposed to pop them at a very early stage. Give it some time to become totally visible. Then use an appropriate way to 'pop' it and collect all the pus and blood on tissue paper until the cut stops bleeding.
My pimples don't smell bad when I pop them

you may wanna use some cream to apply on the area after popping to get rid of smell.
Another better way instead of popping pimples is to use a thermal device to clear away pimples before they have a chance to become nasty and ugly. This device is known by the name of Zeno. It has been found to be very effective and might be of great help to you.