Your hair follows a natural cycle, and a key part of that cycle is the anagen (growth) phase. When this phase begins to shorten earlier than it should, your hair spends less time growing and more time resting or shedding. You might notice changes that seem subtle at first but are worth paying attention to. Here are two clear warning signs that your hair's growth phase may be shortening prematurely, along with what you can do about it.
Warning Sign #1: You Notice More Hair in Your Brush or Shower Drain
A little shedding is normal—most people lose 50 to 100 hairs a day. But when you start seeing significantly more strands in your brush, on your pillow, or swirling down the shower drain, it may signal that a larger number of hairs are entering the shedding (telogen) phase early. This is sometimes called telogen effluvium, and it can happen after physical stress, illness, or nutritional shifts.
If the growth phase shortens, follicles release hairs sooner than planned. You might not see bald patches at first—just a gradual thinning all over the scalp. This can be especially noticeable after recovering from a high-fever illness like COVID-19, which is known to trigger temporary hair shedding in many people.
Warning Sign #2: Your Hair Looks Thinner at the Crown or Temples
Another red flag is visible thinning concentrated around your crown or temples. When the growth phase shortens, new hairs may not reach their full length or thickness before falling out. Over time, the scalp becomes more visible, and your ponytail may feel smaller than it used to.
This pattern can be subtle at first—you might just feel like your hair isn't as full as it once was. But if you consistently notice widening parts or thinner sections near your hairline, your hair growth cycle may be speeding up its timeline.
What Can Shorten the Hair Growth Phase?
A few common triggers can disrupt the normal hair cycle:
- Illness or infection: High fevers, viral infections like COVID-19, and other major illnesses can push hair follicles into a resting state.
- Nutritional deficiencies: Low levels of iron, vitamin D, vitamin B12, or zinc can interfere with hair follicle function.
- Physical or emotional stress: Significant stress—whether from surgery, weight loss, or emotional strain—can trigger early shedding.
- Hormonal changes: Pregnancy, postpartum, thyroid imbalances, or menopause can alter the growth cycle.
How to Support a Healthy Hair Growth Cycle
While you can't always prevent a shortened growth phase, you can create conditions that help your hair cycle return to normal. The goal is to give your body the nutrients it needs to support new hair formation.
Focus on Protein and Healthy Fats
Hair is made mostly of protein (keratin). Eating enough protein from sources like eggs, lean meats, beans, and lentils helps your body build strong hair strands. Healthy fats from nuts, seeds, and avocado also support scalp health and hormone balance.
Incorporate Key Nutrients
Certain vitamins and minerals play direct roles in hair growth. According to experts like nutritionist Pooja Makhija, these include:
- Vitamin D: Helps create new hair follicles. Low levels are linked to alopecia and shedding.
- Vitamin B12: Supports red blood cell formation, which carries oxygen to the scalp.
- Vitamin C: An antioxidant that helps protect hair follicles from oxidative damage, especially after illness.
Food sources like almonds (magnesium), walnuts (potassium), chia seeds (phosphorus), and pumpkin seeds (zinc) can all contribute to a healthier growth environment.
A Note on Supplements: Always check with a healthcare provider before starting any new supplement. The right dosage depends on your individual levels and needs.
Consider Gentle Scalp Care
Over-styling, harsh chemicals, and tight hairstyles can add mechanical stress that worsens shedding. Give your scalp a break by using gentle shampoos, avoiding high heat, and letting your hair air-dry when possible.
When to See a Professional
If you notice either of these warning signs lasting more than two to three months, it's a good idea to see a dermatologist or a primary care provider. They can run blood tests to check for vitamin or mineral deficiencies, thyroid problems, or other underlying conditions that might be shortening your hair's growth phase.
Most cases of temporary shedding resolve on their own once the trigger is addressed. But catching the signs early gives you a better chance of supporting your hair cycle before more noticeable thinning develops.
Your hair reflects your overall health. By paying attention to these two warning signs—increased shedding and visible thinning at the crown or temples—you can take proactive steps to nourish your body and help restore a normal growth rhythm.
