What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Flakes, Lice Eggs, Nits, Dandruff and Dry Scalp

Our scalp consists of many layers with innermost layer, a ground for growth of cells and uppermost layer, the protective skin that consists of dead cells. Flakes, Lice Eggs, Nits, Dandruff and Dry Scalp are the names of some common scalp problems that we face, bear and even treat in our routine life.