How Long Does It Take For Hair To Grow Back guy with long hair
Written by
Morgan German
Medically approved by
Ahmad Chaudhry M.B.B.S.

Hair is an essential organ of our body that imparts beauty, self-satisfaction, and confidence.

We all, sometimes in our lives, get entangled in scenarios where we start losing hair. It can be a physiological or pathological phenomenon, and in most cases, you shouldn't worry too much about it.

It leads us to the question "how long does it take for hair to grow back?". You can't stop worrying if it doesn't return soon, right?

In this article, a dermatologist will discuss the average rate of hair growth and hair growth period after various physiological and disease-related hair losses.

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How does hair grow?

Hair growth starts from the hair follicles in the scalp. They are also called hair roots. It gets its mandatory nourishment from the blood vessels and starts growing.

Ideally, in a healthy person, hair grows about half an inch in a month. It is a variable figure and changes from person to person depending on genetics, age, hair color, gender, climate, and ethnicity.

Some people can grow their hair super fast using some products, while others can do it without any growth-enhancing product.

How long does it take for hair to grow back?

Hair can regrow with variable speed after hair loss.

They cannot grow in some circumstances if we lose the hair follicles permanently.

Let's discuss the hair regrowth after various phenomena.

After haircut

hair cut

According to the American Society of Dermatology, after a hair cut in an average healthy person, it usually a month to regrow your hair back by half an inch.

If you are a female and lost inches of hair in a haircut, remember it takes almost a year to regrow about six inches of hair.

These figures vary in both genders, and researchers have proven that males have the innate ability to regrow their hair fast and effectively.

After chemotherapy

Post-chemotherapy hair loss is common in cancer patients. It happens due to the disastrous effect of cancer medicine on hair. After three months of hair loss, soft hairs start appearing on the scalp.

The speed of hair growth is initially low, and then after a couple of months, it becomes normal to six inches a year.

After pattern baldness

pattern baldness

Pattern baldness is a normal physiological process that results in hair fall after forty years of age. It is a permanent hair loss, and we cannot regrow the hair back after pattern baldness.

Follow our guide to discover whether you have early signs of balding.

Fundamentally, hair follicles (or hair roots) get destroyed in pattern baldness. Hence, it is impossible to get them back.

The only solution to this problem is delaying the pattern of baldness by taking FDA-approved solutions like finasteride and minoxidil.

For example, finasteride interacts with the hormone that promotes pattern baldness and inhibits its production from the brain. See what result timeline should you expect with finasteride.

Please always remember to contact your doctor before starting either of them. They do come with side effects.

If you are unconvinced that the side effects of minoxidil are worth the growth, check out these drug and natural alternatives to minoxidil.

After hormonal disturbances

Hair growth is directly dependent on hormones like testosterone, progesterone, and estrogen. Many people experience an average physiological hair fall when there's a rush of testosterone.

It is normal, and we can get our hair back once the hormone level returns to the baseline. After the hormone level reaches normal, our hair starts growing again at the speed of six inches per year.

Variations are there depending on the hormone level and age of the person.

After dermatological pathologies

test tubes dermatology

Hair fall after dermatological pathologies is a common side effect. It happens because of the direct attack of microorganisms on the hair follicle.

Alopecia, psoriasis, and hair fungal infections are the most common dermatological pathologies associated with hair fall.

Hair starts regrowing once we cure them promptly with the medications. However, there are chances that it can become permanent, and hair does not grow back. Don't worry, you can always check out hair transplant options.

Ideally, hair starts growing at half inches a month after one week of recovery from the ailment.

After waxing

Waxing removes the visible part of the hair. It has nothing to do with the follicle and root. It usually takes a couple of weeks to see the sprouting of hairs again on the skin. It is believed that hair grows faster after waxing.

After shaving

shaving

Shaving the hair with a razor is a common practice to get rid of unwanted hair. It removes the hair just above the roots and preserves its ability to grow back.

It usually takes two weeks to get your hair back after shaving. After then they grow at the pace of half an inch per month.

After medical conditions

Thyroid abnormalities and diabetes are the common conditions associated with hair loss. It is a relief to know that we can get our hair back after the successful treatment of the disease.

Initially, the hair growth is prolonged, but it becomes standard in about one to two weeks.

How to grow hair back faster?

Hair growth depends upon the person's age, medications, genetics, and reason behind hair loss. Following things should be done to speed up the process of hair growth:

  1. Take finasteride and minoxidil spray regularly (consult your doctor)
  2. Do regular oiling of your hair
  3. Eat a healthy diet rich in vitamins and minerals
  4. Use a good quality shampoo that contains biotin as an active ingredient.
  5. Do not smoke.
  6. Avoid exposure to excessive sun rays and salt water on the hair.
a woman smiling under the sun

Conclusion

I believe that should answer your question "How Long Does It Take For Hair To Grow Back?".

Hair usually grows back at about half an inch per month. It is important to note that hair care is an essential practice to make your hair healthy, shiny, and grow fast.

About 99 percent of the time, hair regrows back at the speed of half an inch per month. If it is not the case, you might want to contact your registered healthcare practitioner to treat the underlying pathology.

References

Bernard, B. A. (2016). Advances in Understanding Hair Growth. F1000Research, 5. https://doi.org/10.12688/f1000research.7520.1

Cafasso, J. (2019, February 15). How Long Does It Take for Hair to Grow Back in Various Cases? https://www.healthline.com/health/how-long-does-it-take-for-hair-to-grow-back

Miteva, M., Misciali, C., Fanti, P. A., Vincenzi, C., Romanelli, P., & Tosti, A. (2011). Permanent alopecia after systemic chemotherapy: a clinicopathological study of 10 cases. The American Journal of Dermatopathology, 33(4). https://doi.org/10.1097/DAD.0b013e3181fcfc25

Van Neste, D. (2004). Thickness, medullation and growth rate of female scalp hair are subject to significant variation according to pigmentation and scalp location during ageing. European Journal of Dermatology: EJD, 14(1). https://pubmed.ncbi.nlm.nih.gov/14965792/