First check the shoes, moisture and friction. The colour of an insole does not make a diagnosis by itself.
I went to the village with my family — and suddenly the insoles started turning red. First spots appeared, then I looked closer and saw a red line along the edge on the reverse side. Where the foot does not touch the insole at all, and the insole rubs against the inside of the shoe.
I had almost managed to feel that my “heart had started to hurt”. Then I stopped. Enough. I drove the bad thoughts away and started thinking critically.
In the village I wore the insoles on a bare foot. Dust, small stones, sweat, humidity, constant friction. All of this appeared at the same time as the spots. So this article is not about how to diagnose yourself by insole colour. It is about something else: why an unusual mark is worth attention, but should not be turned into a sentence.
The manufacturer links a colour change to attention to health. The colour itself does not make a diagnosis: first check friction, moisture, dust and contact with the shoe. If symptoms are alarming, seek medical help.
In the description of corrective anion insoles the manufacturer suggests treating a colour change as a signal to pay attention to certain body systems:
There is also an important caveat: changes are individual and do not happen to everyone.
This is the manufacturer position. You can hear it, take it as a personal reason to ask “how do I actually feel?” and, if needed, book an ordinary diagnosis. But insole colour does not make a diagnosis, does not identify an organ and does not exclude a problem if the colour did not change.
My mark had one detail that cannot be ignored: the red line ran along the edge, on the reverse of the insole. The foot does not reach there. The shoe does, constantly.
The insole constantly crumples and moves inside the shoe. Where the edge rubs the lining, the material can wear, change shade or absorb particles of the neighbouring layer.
In the shoe industry this is called dye migration: one material colours another in close contact. For shoe uppers, linings and insoles there is a separate GOST ISO 17701-2013 on dye migration. Moisture, heat and constant friction give such transfer more chances.
A sock takes part of the moisture, dust and friction. Without it all of this stays between the foot, the insole and the shoe. This is ordinary physics of wear, not a sign that something is wrong with the person.
Laboratories do create colour sensors for sweat. But such a sensor has a known reagent, a defined indicator, a measurement range and a comparison with a reference method. A visible spot on an insole cannot be treated as a medical analysis. It can be treated as an observation.
The main task of this model is foot correction. Not searching for diagnoses by spots.
The product documents include a Russian patent for the construction of a corrective insole with anatomical zones of different height, massage points, recesses, magnets and tourmaline. This is a document about construction. It does not prove treatment of diseases and does not turn colour into a diagnosis.
Construction, documents and use rules are in the anion insole card.
No. Spots cannot determine the presence or absence of heart disease. The manufacturer links the red colour to the theme of the heart and suggests paying more attention to how you feel. This is a reason to assess symptoms and, if needed, go through an ordinary examination — not a ready diagnostic result.
One side may touch the shoe more, receive more moisture or rub against a seam and lining. Compare both insoles, the inner surface of the shoes and the zones where the mark appeared.
If there is no pain, skin irritation or other discomfort, first check the shoes, moisture and the material against the manufacturer instructions. If the foot is uncomfortable or the skin reacts, pause and find the cause.
A red mark on an insole is not a reason to frighten yourself. But you should not wave away how you feel either.
The manufacturer suggests treating a colour change as a personal signal to pay more attention to yourself. A good next step is to check the obvious causes: shoes, friction, moisture, dust and care. And if there are symptoms that truly worry you, go not for a colour decoding but to a doctor.
