Hair Shedding During Cold Capping: What to Expect Around Weeks 2 and 3

And the timing matters.

Chemotherapy-related hair loss commonly starts around 2 to 3 weeks after the first chemotherapy treatment. So if you are reaching that point and suddenly seeing more hair come out, you are also reaching the time when chemotherapy-related hair loss can become noticeable.¹

You may also notice something that seems contradictory:

New hair growth can happen during chemotherapy too.

You can be shedding some hair, retaining other hair and seeing new growth at the same time.

Why can shedding start around weeks 2 and 3?

Chemotherapy works by targeting rapidly dividing cells.

Cancer cells divide rapidly, which is why chemotherapy can be effective against them. But cells associated with your hair follicles also divide rapidly, which is why certain chemotherapy drugs can cause thinning or hair loss.

If your chemotherapy causes hair loss, it will often begin around 2 to 3 weeks after your first treatment, although the exact timing varies from person to person.¹

This period can feel particularly difficult when you are cold capping.

Until then, you may have been watching and waiting. Then suddenly you see noticeably more hair coming away.

It can feel as though something has changed overnight.

Cold capping does not have to mean zero shedding to be helping

The aim of cold capping is to reduce chemotherapy-related hair loss.

It cannot guarantee that every strand of hair will remain in place.

Scalp cooling lowers the temperature of the scalp. This reduces blood flow to the area and can reduce the effect some chemotherapy drugs have on the hair follicles.²

But results vary from person to person.

They can also vary depending on your chemotherapy drugs, doses and treatment schedule.

Even with scalp cooling, your hair may become thinner. Some people will still lose a significant amount of hair.

Cold capping is not necessarily all or nothing.

You may lose some hair while retaining other hair. You may maintain more coverage than you otherwise would have. And new hair may begin growing while chemotherapy is still continuing.

Hair can start growing during chemotherapy

It is easy to think of chemotherapy-related hair changes as two completely separate stages.

First, hair falls out during chemotherapy. Then, once chemotherapy finishes, it starts growing back.

But it does not always happen that neatly.

Hair can sometimes begin growing back between chemotherapy treatments.¹

So several things may be happening at the same time:

• Some hairs may be shedding.
• Other hairs may remain in place.
• New hairs may already be growing.

You might notice short new hairs appearing while longer hairs are still shedding elsewhere.

Everyone’s experience is different, and new growth during chemotherapy is not guaranteed.

What can successful cold capping actually look like?

It is understandable to start cold capping hoping you will finish chemotherapy with exactly the same amount of hair you had before treatment.

But that can create a very unforgiving definition of success:

Hair falling out means failure.

No hair falling out means success.

The reality is more complicated.

Why continuing cold capping may still matter

It is an understandable question.

But shedding does not necessarily mean there is nothing left to protect.

There may still be hair that can be retained. New growth may begin while treatment is continuing. And there is evidence that scalp cooling may also benefit hair recovery after chemotherapy.

Macmillan Cancer Support reports that research has found hair can grow back faster and stronger during the 12 weeks after treatment among people who used scalp cooling.²

Published clinical research has also found that scalp cooling can reduce the risk of persistent chemotherapy-induced hair loss in the patient groups studied.³

These findings cannot predict what will happen for any individual person.

But they show why cold capping should not be judged only by one question:

There is a bigger picture.

You are trying to retain as much hair as you reasonably can during treatment while giving your hair the best possible chance to recover afterwards.

What should you do when shedding starts?

Most importantly, do not panic and suddenly change everything you are doing.

What if I am losing more hair than I expected?

This can be one of the hardest moments.

You may have started cold capping hoping to lose very little hair. When your experience does not match that expectation, disappointment can quickly turn into fear.

But cold capping cannot guarantee exactly how much hair an individual will retain.

Some people using scalp cooling will still experience substantial thinning or hair loss.

That does not automatically mean the process has provided no benefit.

You may still retain hair and coverage. You may see new growth during treatment. And scalp cooling may still have value for how your hair recovers afterwards.

Cold capping does not always produce a choice between keeping everything and losing everything.

There can be meaningful outcomes between those two extremes.

What about bald spots or uneven shedding?

If one particular area appears to be thinning much more than the surrounding hair, contact the Penguin Cold Caps team so we can review your cap fit and technique.

Good contact between the cap and scalp matters.

However, uneven shedding does not automatically mean the cap was fitted incorrectly. Chemotherapy-related hair loss can vary across the scalp too.

The important thing is not to guess.

If something can be adjusted before your next treatment, it is better to identify it and give yourself the best possible chance going forward.

Before you decide to stop, remember why you started

Maybe you started cold capping because you wanted to keep as much of your hair as possible.

Maybe keeping your hair helps you look in the mirror and feel more like yourself.

Maybe you wanted greater privacy around your diagnosis.

Maybe you wanted to maintain some sense of normality during treatment.

Or perhaps you simply wanted to do everything reasonably possible to protect your hair.

Whatever your reason, shedding does not make that reason disappear.

You can shed hair and still retain hair.

You can shed hair and see new growth.

And you can experience thinning during treatment while still potentially benefiting from scalp cooling as your hair recovers.