Shedding vs Breakage: The Pull Test and the Shower Drain Tell

The hairs in the shower drain are telling you something, but not what most people think. A shed hair has a small white bulb at the root, because it completed its growth cycle and released. A broken hair has no bulb, because it snapped somewhere along the shaft. The drain full of hairs with bulbs is shedding. The drain full of short pieces with no bulb is breakage, and the two need opposite fixes.

The American Academy of Dermatology says it is normal to shed between 50 and 100 hairs a day, and that range is the baseline. Shedding well above that for weeks is called excessive shedding, or telogen effluvium, and it has a timeline that points to its cause. Breakage has no timeline. It has a cause in the hair itself, and the fix is in the routine, not in the body.

The pull test, done properly

The pull test is simple and it is the first thing a dermatologist does. Take a small section of hair, about 60 strands, and pull gently from the roots. If more than six hairs come out, the test is positive, and it points to active shedding. If two or three come out, that is normal. Do it on hair that has not been washed for a day, because washing removes the loose hairs and the test reads low.

The check that matters is the bulb. Look at the hairs that came out. A bulb at the root means the hair shed from the follicle, which is a growth cycle event. No bulb means the hair broke, which is a shaft event, and the break is usually at a weak point: a bleached section, a heat damaged length, or a spot where a tight ponytail pulls every day. The bulb is the diagnosis, and it takes ten seconds to check.

The timeline that points to telogen effluvium

Telogen effluvium is the medical term for excessive shedding, and it has a signature delay. A stressor, a high fever, major surgery, childbirth, rapid weight loss, or a severe illness, pushes a large group of growing hairs into the resting phase at once. The hairs sit in the resting phase for two to three months, then they shed together. The shedding starts two to three months after the trigger, which is why people are confused: the illness was months ago, and the hair is falling out now.

The AAD says that as the body readjusts, the shedding stops, and within six to nine months hair tends to regain its normal fullness. That timeline is the reassurance and the test. Shedding that starts two to three months after a clear trigger and slows within six to nine months is telogen effluvium. Shedding that continues well beyond six to nine months without slowing, or that comes with patches, pain, or itching, is a dermatologist visit, not a waiting game.

Breakage has a different fix

Breakage is a shaft problem, and the fix is in the routine. Tight ponytails, especially the same ponytail in the same place every day, break hair at the tie line, which is why the hairline thins in a band. Heat styling without a protectant, bleaching without a bond builder, and rough towel drying all break the shaft at its weakest points. The fix is to change the routine: looser styles, a silk scrunchie instead of an elastic, a heat protectant before the dryer, and a microfiber towel instead of a terry one.

The distinction matters because the treatments are opposite. Shedding needs time and, sometimes, a workup for iron, thyroid, or nutrition. Breakage needs a gentler routine and a trim of the split ends, because a split end cannot be repaired, only cut. Treating breakage with a supplement, or treating shedding with a new shampoo, is the wrong fix for the right problem, and it wastes the months that the right fix would have used.

Keep reading: Hard Water and Hair: Chelating Shampoos, Noted, Ponytail Headaches and Traction: Notes on Tension, and Scalp Sunburn: The Parting Burn and What Changes Next Time cover the nearby cases in this series.

Frequently asked questions

How do I tell shedding from breakage?

Look for the bulb. A shed hair has a small white bulb at the root, because it completed its growth cycle. A broken hair has no bulb, because it snapped along the shaft. Shed hairs are full length, broken hairs are short pieces.

How much hair shedding is normal?

The American Academy of Dermatology says 50 to 100 hairs a day is normal. Shedding well above that for weeks is excessive shedding, or telogen effluvium, and it usually starts two to three months after a trigger like illness, surgery, or childbirth.

What is the hair pull test?

Take about 60 strands and pull gently from the roots. If more than six hairs come out, the test is positive for active shedding. Do it on hair that has not been washed for a day, because washing removes the loose hairs first.

When does shedding mean I should see a dermatologist?

If it continues beyond six to nine months without slowing, if there are patches, pain, or itching, or if it comes with other symptoms. The AAD says fullness usually returns within six to nine months after the trigger passes, so shedding beyond that window needs a workup.