Keep aftercare simple.
“Avoid harsh products, heavy oils or heat styling immediately afterwards. Gentle cleansing and soothing scalp products can help support recovery,” she adds. “It is also important to allow the scalp time to recover between sessions rather than repeating treatment too frequently.”
Monitor the scalp after treatment.
“Look out for excessive redness, swelling or signs of infection afterwards,” says Souza—noting you should consult a medical professional if you have any concerns.
If you have no adverse effects, repeat based on your derma roller’s needle length.
“Frequency depends on needle length—shorter needles can be used weekly or twice weekly, while longer needles are typically used less frequently,” adds—though needles larger than 0.5mm are not advised for at-home use. “Consistency over several months is essential, as hair-growth cycles are slow and visible results often take three to four months or longer.”
Who does hair derma rolling work best for?
“Derma rolling is most appropriate for individuals with early to moderate hair thinning, particularly androgenetic alopecia in men or women, where follicles are still present but miniaturizing,” says Souza. “There is also some emerging evidence that it may support treatment of conditions like alopecia areata or telogen effluvium, although the data is less robust.”
And while microneedling can stimulate growth factors and improve circulation around hair follicles—which may help support thicker, healthier hair strands—“it tends to work best when there is an underlying thinning process rather than simply trying to boost already-healthy hair,” adds Dr Jaafar.
“If someone has naturally fine hair but no underlying scalp or follicle issues, derma rolling will not fundamentally change hair genetics,” adds Souza. “In my clinical experience, it is most beneficial where there is early thinning or weakened follicles, rather than purely cosmetic thickening in completely healthy hair.”
Which needle length derma roller is best for at-home use?
“For home use, 0.2-mm to 0.5-mm needles are the safest and most appropriate,” says Souza. Here’s a quick guide:
- 0.2-mm – 0.3-mm derma rollers: Primarily increase transdermal absorption of topical treatments, with minimal impact on follicular stimulation. Since the stratum corneum (the outermost layer of the skin) acts as a natural barrier, microneedling at this depth helps to temporarily increase permeability, allowing active ingredients to be better absorbed.
- 0.5-mm derma rollers: Can provide some degree of stimulation to the scalp by increasing blood flow and activating mild inflammatory pathways, though it does not reach the deeper dermis where follicular stem cells are located.
