+29 How Long Until Hair Grows Back After Chemo 2023. Hair usually begins falling out two to four weeks after you start treatment. Web hair regrowth timelines after chemo vary, but many patients report hair regrowth beginning as early as a couple weeks after treatment, usually starting with thin or fuzzy growth.
Web some people have darker or curlier hair at first, then find that their “old” texture and shade return over time. In very rare cases, the hair does not grow back. Most people fully recover their hair within six months.
