Under Armpit skin Pigmentation is a huge turn off.

This is one skin challenge most people are having today...some consider it important to look for solution while some feel is normal and don't bother looking for solution for it, and goes about exposing it with the kind of clothes they put on.
It's really awful and not a good sight to behold. It's a huge turn off..it makes one look or appear dirty.
Shaving without some sort of lubrication is the reason for outburst of black heads . What you use in shaving is another reason but it will be advisable to use fresh razor or shaving stick any time you are shaving

Essential oils

To avoid sensitive skin it will be good to choose one one essential oil to calm and restore moisture to your under arm skin. Mind you it's not one time application of this essential oil after shaving that will keep bumps and pigmentation away. It's going to be a constant therapy to keep that part of your skin clean. It also helps to avoid friction of the skin under arms bumps and black heads are bound to eruptions there is no constant lubrication of the under arm especially when you are big side.Cause the more your under skin rub off on each other it cause frictions which cause black head to start forming .
To avoid this make it a habit of using natural essential oils like castor oil,garlic oil,ginger oil, or natural body oil for deep moisture.