I Failed Hair Science Until I Learned These 4 Cycle Phases

By the Edge Naturale Editorial Team · Medically reviewed by Shelia Davis, Edge Naturale Medical Team · Last updated June 2026

Quick answer: Every strand on your head moves through four phases: anagen (active growth), catagen (transition), telogen (rest), and exogen (shedding). The whole journey can take two to six years for scalp hair. When stress, tension, or damage cuts that cycle short, you get thinning, breakage, and edges that seem to stop growing altogether.

Why did I think hair just... grew?

For most of my life I treated hair like a plant you water. Moisturize it, protect it, leave it alone, and it grows. That logic is not entirely wrong, but it skips the most important part: the follicle itself has an internal clock, and if that clock gets disrupted, no amount of edge control or growth serum will fix it until you understand what phase you are actually in.

So let me walk you through what the science actually says, separate the real from the recycled myths, and explain what it all means for Black women who are watching their edges get thinner every year.

What are the four phases of the hair growth cycle?

The hair growth cycle is not one steady process. It is four distinct phases, and each follicle runs on its own independent schedule. That is why you shed some hairs every day without going bald.

At any given time, roughly 85 to 90 percent of your hair follicles are in anagen. The rest are resting or shedding. That ratio matters a lot when things go wrong.

Myth vs. Fact: what most people get wrong about the growth cycle

Myth: If your hair is shedding, it stopped growing.

Fact: Shedding is a normal, built-in part of the cycle. The exogen phase exists so the follicle can reset. The problem is not shedding, it is when more follicles than usual get pushed into telogen at the same time. That is called telogen effluvium, and it is why postpartum hair loss can feel sudden and alarming even though the follicles are usually still healthy underneath.

Myth: Your edges grow slower because of your hair type.

Fact: Tightly coiled hair does not have a slower growth rate by nature. Research published in the International Journal of Dermatology found that African hair grows at roughly the same rate as other hair types at the scalp level. The difference is retention. Tightly coiled strands are more prone to mechanical breakage at the curl bends, so the hair appears not to grow when it is actually breaking off before you see the length.

Myth: Once your edges are gone, the follicle is dead.

Fact: This depends entirely on what caused the loss and how long it has been happening. Traction alopecia, which is hair loss from repeated tension caused by tight styles, wigs, lace glue, and braids, can be reversible in its early stages. The American Academy of Dermatology notes that if the tension is removed before permanent scarring sets in, many follicles can recover. Scarring alopecia is a different situation and requires a dermatologist's evaluation.

Myth: Scalp massages are just a wellness trend with no real effect.

Fact: A small but cited 2016 study published in ePlasty found that standardized scalp massage increased hair thickness in participants over 24 weeks. The proposed mechanism is increased blood flow to the dermal papilla, the cluster of cells at the base of the follicle that signals the anagen phase to begin and continue. More blood flow means more oxygen and nutrients reaching the root during its most active period.

This is where a peppermint-based product can genuinely fit into your routine. Peppermint oil has been studied for its ability to increase dermal papilla depth and follicle count in animal models, with a 2014 study in Toxicological Research showing results comparable to minoxidil in mice. Human evidence is still limited, but the mechanism is real and the ingredient is safe. The Follicle Enhancer combines peppermint with argan, jojoba, and coconut in a cream formula designed to be massaged into the edges, which means you get the circulation benefit from both the massage and the ingredients together.

Myth: Trimming your ends makes your hair grow faster.

Fact: Trimming has zero effect on the follicle. Hair grows from the root, not the tip. What trimming does is remove split ends that would otherwise travel up the shaft and cause more breakage. So it helps you retain length, which can make hair appear to grow faster, but the follicle does not know or care that you cut anything.

What actually disrupts the growth cycle for Black women specifically?

Traction is the biggest one. Tight braids, high ponytails, sewn-in weaves, and glued lace frontals all pull on the follicle at the root. Sustained tension can push follicles out of anagen prematurely and, over time, cause the kind of scarring that makes recovery much harder. The AAD identifies traction alopecia as one of the most common causes of hair loss in Black women.

Beyond traction, these are the main cycle disruptors:

• Postpartum hormonal shifts: Estrogen levels drop after delivery, pushing a large portion of follicles into telogen at once. Shedding usually peaks around three to four months postpartum and tends to resolve on its own within a year.
• Chronic stress: Cortisol has been shown to suppress the anagen phase. This is not just psychological; it is hormonal and documented in dermatology literature.
• Nutritional deficiencies: Iron, zinc, and biotin deficiencies are all linked to hair thinning. A blood panel from your doctor is the only way to know for sure.
• Chemical damage from relaxers: Overprocessing can damage the follicle opening and the scalp tissue around it, making it harder for new growth to push through cleanly.
• Scalp inflammation: Conditions like seborrheic dermatitis or folliculitis can shorten the anagen phase if left untreated.

What can you do right now?

1. Give your edges a break from tension. Even two to four weeks without a tight style can make a visible difference if the follicles are still viable.
2. Add scalp massage to your routine. Five minutes a day with gentle circular pressure at the hairline is enough to stimulate blood flow.
3. Look at your diet. If you are consistently low on iron or protein, your follicles will feel it.
4. See a dermatologist if you have patches of complete loss, scalp pain, or itching. Early intervention matters more than any product.

FAQ

How long does one full hair growth cycle take?

For scalp hair, one complete cycle can take anywhere from two to six years depending on genetics. The anagen phase is the longest part. Your edges and hairline tend to have shorter anagen phases than the hair at the crown, which is one reason they appear slower to grow back after loss.

Can hair follicles that have been dormant for years come back?

Sometimes. Follicles that are dormant but not scarred can potentially reactivate, especially when the original stressor is removed. Scarred follicles, where the follicle structure has been replaced by fibrous tissue, generally cannot recover. A dermatologist can assess this with a scalp examination or biopsy if needed.

Is postpartum shedding a sign something is wrong?

Usually not. Postpartum hair shedding is a normal response to the hormonal drop after delivery. Most women see it peak around three to four months after giving birth. It tends to resolve within six to twelve months without treatment. If it continues past a year or is accompanied by other symptoms, a doctor visit is worth it to rule out thyroid issues or iron deficiency.

Does protective styling help or hurt the growth cycle?

Both, depending on how it is done. Loose protective styles that keep your hands out of your hair and reduce mechanical friction can genuinely help with retention. Styles that are too tight, too heavy, or left in too long tip into traction territory and can shorten the anagen phase for the follicles under the most tension.

How do I know what phase my hair is in right now?

You cannot tell from looking in a mirror. The clearest signals are what you are shedding. A hair that falls with a small white bulb at the root has completed telogen naturally. A hair that breaks mid-shaft has not shed; it has snapped from damage. Tracking how much you shed versus how much breaks can help you figure out whether your issue is a cycle disruption or a breakage problem, and those have different solutions.

This article is for education and is not medical advice. If you are worried about hair loss, see a board-certified dermatologist. These statements have not been evaluated by the FDA. Edge Naturale products are not intended to diagnose, treat, cure, or prevent any disease.