Does Cutting or Shaving Hair Make It Grow Faster or Thicker?
Does a haircut speed up growth? What dermatologists say
No, cutting your hair does not make it grow faster. The American Academy of Dermatology (AAD) quotes Mayo Clinic dermatologist Rochelle Torgerson calling it a popular but false myth, because hair growth happens below the skin and a cut never reaches that far. Cleveland Clinic puts scalp hair at roughly 10 to 15 cm a year, and genes, age and general health set that pace, not scissors. The myth probably survives because a fresh cut has a sharp outline, so every millimetre of regrowth shows against it within a couple of weeks. Cleveland Clinic adds that about 80% of your hair is in the growing phase at any moment, whatever you do with it. Regular trims do help in one narrow way. Torgerson says they make hair grow healthier because they remove the hair that would split, but not faster. Cleveland Clinic dermatologist Wilma Bergfeld compares a split end to a rip in a stocking that runs up the fibre: you have to clip it off, or the hair keeps breaking and ends up even shorter. Frequent cuts never add length, but ends left to split take length away. If you are growing your hair out, trim only the ends that need it and leave the rest alone. If you keep it short, the schedule is about shape, not speed.
Why hair looks thicker after a cut or a shave
Does hair come back thicker after a shave or a cut? No. Mayo Clinic says shaving does not change the thickness, colour or rate of growth of hair. Only the tip changes. A cut leaves a blunt end that can feel coarse and stubbly while it grows out, and the hair may look darker or thicker for a while. Cleveland Clinic dermatology resident Taylor Bullock explains that you are looking at the thicker, darker base of the shaft instead of the thin, lighter, tapered end, and once the hair is longer it returns to its softer original texture. A 2007 BMJ review of medical myths cites a clinical trial from 1928 that found no effect from shaving and says newer studies agree. It adds that new hair has not yet been bleached by sun or chemicals, which is why it looks darker than the older hair around it. Cleveland Clinic describes the shaft as dead skin cells: a shave cuts it above the skin and leaves the root in the follicle untouched. The same logic covers clippers and a shaved head. Cleveland Clinic adds that the stubble stage passes quickly on the scalp, because hair grows faster there than on eyebrows or thighs. If stubble feels harsh, moisturise: the drier the hair, the pricklier it feels.
Hats and plucked grey hairs: two more myths checked
Two more myths come up next to these. Do hats cause baldness? Cleveland Clinic dermatologist John Anthony says the topic is poorly studied, but the two twin studies usually cited found no link between hats and thinning. In a study of 92 male identical twins, the men who wore a hat every day had less hair loss at the temples than their twin who did not. Male pattern baldness is hereditary, and Cleveland Clinic lists age, genetics, hormones, medical conditions, medications and nutritional deficiencies as the usual causes of hair loss. So choose a loose hat over a very tight one, which could in theory stress the follicles. Does plucking a grey hair bring more? Each hair grows from its own follicle, so one pluck does not turn into two. Hair turns grey when its follicle stops making melanin, the AAD explains. It notes that a plucked hair grows back grey and that plucking can thin the hair, so trim a grey hair short instead. At 044 Barbershop in Kyiv we would rather tell you to wait another week than cut hair that does not need it yet. If you are growing out, come in and ask the barber to check your ends: they can see the back and the crown, which are hard to judge in your own mirror.