In general, experts recommend trims every six to eight weeks to keep hair healthy.
But everyone’s hair growth timeline is unique, with genetics playing the biggest role. Hormonal fluctuations, nutrition, and age all come into play too. Pregnancy, for example, causes a rise in estrogen that can hair grow faster and look fuller. As we age, hair grows more gradually and becomes thinner.
Nutrient gaps can also slow growth. “People with nutrient deficiencies may lack iron, biotin, or vitamin D, which can decrease hair growth and lead to increased hair shedding,” says Nicole Negbenebor, MD, a dermatologic surgeon with University of Iowa Health Care in Iowa City, who treats hair loss.
All of these factors — along with your hair texture, length, and whether you use hot tools or chemical treatments — influence how quickly your hair grows and how often it needs a trim. Here are some guidelines to follow.
For Short Styles and Pixie Cuts
Trims every four to six weeks can preserve the integrity of your ends, keep them healthy, and help maintain the overall shape of the cut, Dr. Kilgour says.
For Long or Fine Hair
Get a trim every eight to nine weeks, or every two to three months. Fine strands are more prone to breakage, so more frequent maintenance may keep your ends from thinning, notes Kilgour.
For Curly Textures
According to Kilgour, curly hair conceals damage and uneven tips better than other hair textures. The caveat? The hair fiber is more delicate, due to its natural bends, making it more susceptible to damage. Trims every eight to nine weeks to help preserve length and healthy ends.
For Chemically Treated or Heat-Damaged Hair
Regular use of hot tools or chemical treatments like keratin can weaken hair shafts and cause splitting, requiring a trim every six to eight weeks, Kilgour says.
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