Shampooing the Scalp Depending on one’s hair type, shampooing frequency may vary from daily to only once per week. Generally, straighter hair types tend to get oilier than curly to kinky hair types. Even if one does not require daily use of shampoo, it is helpful to wet or dampen the scalp every few days to avoid buildup of dust, dirt and other environmental debris on the scalp.
Handling wet hair Use of a hair conditioner facilitates combing when hair is wet. For hair that tangles, use a wide-toothed comb and begin combing from the ends, slowly working your way up towards the scalp. Avoid vigorous towel-drying or harsh combing and brushing of wet hair, since wet hair, although elastic, can break more easily than dry hair.
Styling products and other chemicals Chemicals in colouring, perming and relaxing products permanently weaken hair and make it more prone to breakage. Avoid applying these products to hair that is already damaged.
Too much brushing Backcombing and overbrushing can cause split ends. Split ends make hair prone to breakage further up the hair shaft. The remedy for split ends is trimming the hair.
Tension-based hair styles & Tying hair up in a style with tension Braided styles such as cornrows, microbraids, box braids, slicked buns and tight ponytails and any style that causes pulling can stretch or tear hair, causing breakage and dislodge hair from its root. Regularly wearing hair in a tight style can lead to traction alopecia, hair loss caused by pulling on the scalp. While it most commonly occurs along the hairline of the scalp, it can truly occur at any site of the scalp that is subject to tension or pulling. It is a reversible form of hair loss initially. When it recurs over several months, it can result in permanent hair loss.
Extensions, Weaves and other Added Hair styles Women, and sometimes men, use extra hair to achieve a specific look, or to give the appearance of fuller hair. These styles can pull on or damage the existing hair. When used with glue, the existing hair can tear, or there may be an irritation or allergic reaction to the glue that occurs on the scalp. It is advised to limit use of these styles and allow for ample time for the hair to be free of extensions/ weaves / hair styles with added hair.
Information as per the Canadian Dermatology Association https://dermatology.ca/public-patients/hair/hair-care/