Growing up, many of us might have believed that an itchy, flaky scalp meant we weren't clean. Now that we're older, we've realized that this notion isn't true, and we're also not alone in our struggle. Dandruff is super common and affects tons of people.

In fact, the International Journal of Trichology reports that many studies have found roughly 50 percent of the world's general populatio deal with unwanted flakes. Dandruff, aka seborrheic dermatitis, can be caused by a variety of factors, including dry skin, sensitivity to hair products, and even certain skin conditions like eczema or psoriasis . It's important to understand that it's a condition that can be managed, and there are plenty of effective treatments available, both over-the-counter and through a skin-care provider.

Anti-dandruff shampoos , for instance, often contain active ingredients like zinc pyrithione or ketoconazole, which can help reduce flakiness and itching as you wash. Moreover, regular washing and using gentle, hydrating hair-care products can make a significant difference in the overall health of your scalp. Ahead, we're coming to you with Dandruff Training 101, with some super effective tips about how to banish those pesky flakes instantly, plus a few of the go-to products that the experts absolutely swear by to help you along the way to a soothed, flake-free scalp.

Kari Williams , PhD, is a trichologist, stylist, and director of education at Cécred. Helen Reavey is a celebrity hairstylist and fou.