Porosity, density, scalp condition: a hair diagnosis decodes your hair and forms the basis of any effective routine. How to do it yourself or at the salon.

Hair diagnosis: finally adapt your routine to the true nature of your curls

On the agenda for this article:

You copied the routine of an influencer with perfect curls. Same products, same steps, same order. On her, a picture-perfect result. On you, limp curls by 11 a.m. and a tight scalp.

So you buy more. A richer leave-in conditioner, a stronger hold gel, a «miracle» mask. The bathroom shelf is overflowing, but the results don't improve. And doubt creeps in: maybe your hair is the problem.

They aren't. This routine doesn't work because it was designed for a different hair type than yours. Before choosing a single product, you need to know who you're talking to: that's the whole point of a hair diagnosis. Here's how to conduct it, just like we do in the salon before every treatment.

How can you know the true nature of your hair?

Observe a clean strand of hair, wet and then air-dried, without touching it. Its natural shape reveals your texture: an S-shape (wavy), a spring (curly), or a tight ring (frizzy to kinky). Complete this analysis with three criteria: the density of your hair, the porosity of the hair fiber, and the condition of your scalp.

Texture is only the visible part. A true diagnosis considers four dimensions:

  • The texture. The famous strand test, which we detail in our method for identifying your hair type.
  • Density. Gather your hair into a ponytail. A fine base requires light textures, a thick base can handle richer treatments.
  • Porosity and elasticity. A porous fiber absorbs products and swells at the first sign of moisture. A strand that breaks cleanly when stretched lacks nourishment; a strand that stretches without springing back lacks structure.
  • The scalp. Take a close look at your roots: areas that are strained, patches of dryness, rapid re-greasing. It's your roots that will produce your future centimeters.

Understanding your hair type takes ten minutes, once. Choosing products blindly requires years of trial and error. And once you've identified your hair type, our complete routine for curly hair (Silo 1 – pillar page) gives you the exact order of steps to follow.

Why aren't my curls forming anymore?

Hair that no longer curls indicates a weakened hair fiber: repeated heat from straighteners and blow dryers, coloring or chemical straightening treatments, lack of hydration, or product buildup that weighs down the curl. The natural springiness is still there at the root; you need to identify what's preventing it from expressing itself along the lengths.

The purpose of diagnosis is precisely this: to trace the cause back to the root cause before treating the symptom.

  • The curl is relaxed along its entire length, but grows back curly at the roots? The fiber has been altered by heat or chemicals. In these areas, no treatment can recreate the original springiness.
  • The loop forms during washing and then collapses? It lacks sealed hydration and structure. This is the most common issue in the salon, and the easiest to correct.
  • Is the loop sluggish, heavy, as if clogged? Silicones or overly rich skincare products have built up. A clarifying wash resets the system.
Why aren't my curls forming anymore?

A suitable routine aims to achieve three objectives, in this order: redefine curls, restore hydration, and add structure to the hair. If your current routine doesn't address all three, a consultation will tell you which one to focus on.

Wearing your hair tied up every day: what impact does it have on the scalp and curls?

Tying your hair up every day dries out the scalp in patches, where the elastic pulls, and creases the curl, distorting it. Tying it up wet is even worse: moisture stagnates against the scalp and unbalances it. Let it breathe several days a week.

An everyday bun seems innocuous. Seen up close, in a salon, it leaves recognizable traces:

  • A dry scalp with patches, on areas of tension, which pull and itch.
  • Tired roots where the elastic pulls, sometimes with small broken hairs around the edge.
  • A broken loop at the fold, which no longer follows the movement of the rest of the strand.

Two simple steps are all it takes to minimize the damage. First, alternate: wear your hair down at home, and use a soft tie (satin scrunchie, clip) rather than a tight elastic. Second, never tie your hair up when it's wet: excess moisture trapped against the scalp creates an environment conducive to irritation and discomfort.

If your scalp already feels tight, a co-wash applied to the roots before shampooing will gently soothe it. And to restore movement, define your curls at the right time after your next wash: they bounce back faster than you think.

Is wetting your hair enough to moisturize it?

No. Wetting brings water to the surface; moisturizing consists of locking this water, the famous H₂O, inside the hair fiber. Without a product to seal it in, the water evaporates in a few minutes and carries away some of the existing moisture. Hair that is re-wet every morning without any treatment ends up drier than before.

This is the most common misconception we correct during diagnosis. A client whose hair is «always dry despite washing it every morning» doesn't lack water: she lacks sealing.

The principle can be summed up in one image. Free water evaporates; retained water nourishes. A spray bottle without leave-in conditioner is like watering in full sun.

This topic deserves its own guide: the difference between hydrating and nourishing, methods for sealing, and choosing products based on your hair porosity. It's all in our guide to hair hydration and nutrition (Silo 3 – pillar page).

What does a hairdresser look at during a salon consultation?

In the salon, hair diagnosis combines observation and discussion: actual texture by area, scalp condition, porosity and elasticity of the hair fiber, technical history (coloring, straightening, heat styling) and lifestyle habits. Ten minutes that determine the choice of treatments and the routine to reproduce at home.

At Pana Beauty, this moment begins every appointment, before the first treatment. Specifically, your hairdresser:

  • Examine the hair when dry, Zone by zone: the natural shape of the curl, the density, the actual fall. This is also why textured hair is cut dry.
  • Examine the scalp : localized dryness, sensitivity, re-greasing.
  • Test the fiber between her fingers: a lock of hair that stretches and springs back is healthy; a brittle or spongy lock tells a different story.
  • Listening to you. Daily bun, sport, swimming, hair coloring six months ago: your daily routine weighs as much as your genetics.
What does a hairdresser look at during a salon consultation?

The goal isn't to keep this knowledge confined to the salon. A good diagnosis ends when you understand your hair, with a routine you can easily replicate on your own the following Sunday. That's our definition of a job well done.

Learn to read your hair, the rest will follow

Remember this method: observe the texture area by area, assess the density and porosity, examine your scalp, and always get to the root cause before buying another product. An effective routine starts with a good diagnosis, never with pretty packaging.

And if you prefer a trained look, come to the salon: every Pana Beauty appointment starts with a complete hair diagnosis, and you leave with a clear routine, explained step by step, that you will know how to do at home.

FAQ: Your questions about hair diagnosis

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