Pollution is the introduction of harmful contaminants into air, water or soil. These contaminants can have dire effects on entire ecosystems, making life more difficult for humans, plants and animals.
What Causes Pimples under the Armpits? Actually, pimples, wherever they are, are occurred due to similar causes. The causes can be sweat, dirt, dust, bacteria, hormone, your bad psychology condition and some others. Besides, the use of wrong deodorant or body soap can also be another factor if there is underarm pimple.
1 The lymph nodes are located under your arm. This is why many people, especially women, get nervous when they find an armpit lump.  The lumps can be caused by bacterial or viral infections, allergies, harmless fat or tissue growths, and cancerous growths.