The honest answer is: not the way an anti-dandruff shampoo does. A head spa is not a medical treatment and will not clear a scalp condition. Anyone telling you otherwise is selling you something.

What it does do is worth knowing about anyway — and if your scalp is sensitive, how a place handles that matters more than what it promises. So here is the useful version of the question.

Flaking and itching are symptoms, not a diagnosis, and they have several quite different causes. Some are simply a dry scalp or product build-up. Others are medical conditions — seborrheic dermatitis, psoriasis and eczema all show up on the scalp, and they need proper treatment, not a spa day.

They can look nearly identical to you in the mirror. That is exactly why guessing is a poor strategy, and why we are not going to guess on your behalf.

See a doctor or dermatologist if the flaking is persistent, if the skin is red, sore, weeping or crusted, if it extends past your hairline onto your face or ears, or if it simply is not improving with an ordinary over-the-counter shampoo.

This is good news rather than bad. Medicated shampoos and prescription treatments exist, they are well studied, and they work. The American Academy of Dermatology publishes a plain-English guide to seborrheic dermatitis — the most common cause of stubborn dandruff — which is a sensible place to start reading.

For a medical scalp condition: no, and you should see a dermatologist. For a scalp that is dull, built-up, tight or neglected: a proper wash and an unhurried hour make a real and immediate difference, and most people are surprised by how much.

Those are two different questions, and we would rather answer both honestly than blur them together. If you are dealing with the first one, go and get it sorted — then come and enjoy the second.