It is a completely harmless skin condition. It affects roughly half the population, but most people have never even heard of it. Found more commonly in women and adolescents, Keratosis Pilaris occurs when there is an excessive build up of keratin (a protein found naturally in the skin). It clogs up the hair follicles which is what leads to those little bumps. They’re rarely ever itchy or painful, just aesthetically displeasing. Due to the keratin in the skin clogging the pores, it often leads to an ingrown hair growing under the skin.
No, it is completely normal and harmless. Popping or roughly scratching them, however, may lead to scars. Although, it is fun and enjoyable, it is definitely not recommended. Excessive scrubbing of the skin may also only irritate it, which would make matters even worse. Exfoliating is recommended, but not to the point where the skin is red and raw.
At the moment there is no cure but there are various treatments you can use to help clear up, or even possibly eliminate your KP. Now, doesn’t that sound nice? Smooth and clean skin? 
Some people eventually out grow it, but others may only develop an even worse case as they age. Pregnancy tends to cause a very sudden outbreak of KP all over the body, as well. There are also various tips I’ve gathered which I definitely recommend you follow to help aid in your journey to healthy skin.
It resembles acne-like bumps found most commonly on the upper-arms. Other places that it can be found are the thighs, calves, forearms, chest, back, buttocks, and face. Pretty much anywhere except the palms and soles. It often gives off a reddish appearance, depending on how light your skin is. It sometimes causes ingrown hairs as the keratin of the skin blocks off the pores, and the hair has no exit point. Although, not dangerous, picking at the bumps can definitely cause scarring.
