Simply speaking, colloidal oatmeal is very finely ground oatmeal. Pretty easy explanation right!
“Colloidal oatmeal is simply oats ground into an extremely fine powder. When added to bathwater, it creates a milky dispersion that prevents the oatmeal from settling rapidly. So the oatmeal stays in the water and doesn’t just sink to the bottom of the bath. When you get into the tub, the colloidal oatmeal feels silky, as it coats, moisturizes, softens, and protects your skin.”
“Run your bath with lukewarm water, and while the tub is filling, add a packet (two to three cups) of colloidal oatmeal under the faucet to help disperse the oatmeal. You may have the urge to take a hot bath, but this will only irritate the skin and remove moisture from your body, so a warm bath is preferable. Soak in the bath for ten to fifteen minutes. When you are ready to get out of the bath, BE CAREFUL. The bathtub will be slick from the oatmeal. When drying, don’t rub your skin since this can irritate the sore areas. Instead, pat yourself dry with a clean towel.”