What are these Red bumps on my front thighs, buttock, and upper back arm?

i've had it all my life on my upper arms and front of my thighs , in fifth grade i got teased for wearing a tank top to school and the "mean girls" just had to mention that i looked like i have pimples covering my arm but in reality all it is your body producing to much karetin that pushes out of your pores.  there's not much you can do about it except use a loofah and a exfoliating body wash on your legs and arms.  the dermatologist can give you a scary slophing lotion that you have to use gloves to apply because it's so strong.  i've also found that using a pumice stone gently on the area will work quite well too.  i don't know much else but i hope this helped.