5 Hair Fall Questions, Answered by Dr. Karen

Seems like every October, the same thing happens: more hair on the pillow, more hair in the brush and a thinner ponytail that wasn't thinner (!!) in July. If you've been quietly counting strands in the shower, you're not alone, and you're not wrong to notice. Seasonal hair shedding is a real pattern, well documented in dermatology, and it tends to peak in the fall for most people with hair.

The question isn't whether it's happening. It's what to do about it, and when something more is going on. So we called Dr. Julie Karen, our Head of Science and resident dermatologist.

Dr. Karen is a board-certified dermatologist, a Clinical Assistant Professor of Dermatology at NYU Langone, and co-author of the Handbook of Dermatologic Surgery that's used to train dermatology residents nationwide. She went to Princeton (summa cum laude, Phi Beta Kappa, varsity soccer), to Weill Cornell for med school (first in her class), and was Chief Resident at NYU. She's a Castle Connolly Top Doctor and a New York Magazine Best Doctor. Yeah. She's really, really smart.

We asked her the five questions people are actually googling right now. Here's what she said.

How much shedding is normal?

More than you'd think. Around 50 to 100 hairs a day is normal, and it spikes with seasons, stress, or illness. What matters isn't the handful in the shower, it's a steady drop in density over time.

Does washing my hair more often make it fall out?

No. Those hairs were already ready to release, so washing just gathers them in one place. Skipping washes doesn't save them, it only lets buildup sit on the scalp. Gentle, regular cleansing helps.

Is it dry scalp or dandruff when the weather turns cold?

Cold air dries skin, but flaking that keeps coming back usually isn't dryness. Dandruff is driven by oil and yeast, and adding more moisture can feed it. If flakes return a day or two after washing, treat it as dandruff.

What does my scalp have to do with how my hair looks?

Everything. Every strand grows from the scalp, so its condition sets the condition of your hair. A balanced scalp is what lets hair come in shiny and full. Better hair almost always starts there.

When should I see a doctor about hair loss?

When the change is consistent, not occasional. Wider parts, a thinner ponytail, visible patches, or shedding that hasn't settled after a few months. Sudden or patchy loss, sooner. The earlier a doctor looks, the more options we have to treat.

A few things that help this time of year

Fall shedding will pass on its own, but how you treat your scalp through it decides what grows in behind it. The move is to keep the scalp clean, balanced, and healthy, so new hair comes in strong instead of fighting through buildup and inflammation.

• Treat flakes as flakes. If dandruff is in the picture, use an anti-dandruff shampoo that actually works. Jupiter's Flake Free Duo pairs the Balancing Shampoo with the Nourishing Conditioner. Zinc pyrithione handles the flakes without stripping the hair you still have.

• Exfoliate the scalp, not just the strands. Dead skin and product residue block the follicle. Two minutes with Jupiter's Exfoliating Scalp Brush during your wash lifts what your fingers miss and stimulates circulation at the root.

• Wash gently, wash regularly. Dr. Karen's point above holds. Skipping washes doesn't save strands, it only lets things build up.

• Watch for the pattern, not the day. A heavy shedding week in October is probably seasonal. A ponytail that's measurably thinner three months in a row is a reason to call a dermatologist.

The point

Hair fall in the fall is usually the body doing exactly what it does. Treat the scalp well, pay attention to what's consistent instead of occasional, and when the pattern tells you to see a doctor, see one. The strands you're growing in are already on their way. They deserve a scalp worth growing from.