Pimple In My Armpit. The cyst sac forms from skin cells and becomes filled with a semi-fluid substance. A pimple is characterized by an infection of a sebaceous gland.

You may be wondering whether the bump in your skin under your arm is a boil or a pimple. The cyst sac forms from skin cells and becomes filled with a semi-fluid substance. If You Have a Lump on Your Neck Check It ASAP.
I cant feel a lump and the lymph glands dont seem swollen.
I did 4 months ago have a very big pimple which I kept squeezing and it did scab over a few times so I was wondering if the dimple could be due to scar tissue from that. This is a harmless lump that forms from keratin the substance that skin cells are made of. Most often what might look like a pimple or pimples in the armpits is in fact something else but thats not to say its impossible to break out under your arms. There are a few options for what you could be dealing.