Remember, you canât out-exercise a bad diet so if youâre eating too many calories each day, it doesnât matter how much walking youâre doing since you will not be able to burn it all off. So, focus more of your attention on the foods youâre eating.
1 Keratosis pilaris causes numerous small, rough, tan or red little bumps around hair follicles on the upper arms, thighs, buttocks, and cheeks.  Keratosis pilaris creates the appearance of gooseflesh, goose bumps, or chicken skin.
1 The cause is unknown; the perspiration is not due to anxiety or stress. 2  Irritant contact dermatitis: Skin inflammation (redness, swelling, pain, or heat) caused by an irritating substance touching the skin. 3  Soaps, deodorant, alcohol, and dry air may all cause irritant contact dermatitis of the armpit.