I do not agree that a panacea is only in insoles. The insoles support your foot from the outside and your muscles will definitely not work with them. And I say horror: at the moment the production of insoles is a business and therefore they are recommended to absolutely everyone. But more often than not, insoles are made statically, but are you sure that you place your foot correctly when walking? There is an alternative - the rolling shoes MBT, the sole of which is specially developed and patented by bioengineering. This shoe relieves stress on the joints and the spine, it makes life much easier, but it is young enough and many simply do not know about it, even doctors. And many doctors don't even want to know, because they have a good profitable business of making insoles. And in shoes, the biomechanics of gait changes, your back straightens, blood circulation improves and your mood improves too. The site is here, mbtshoes.ru/?utm_sou
Valuable opinion of a person with congenital flat feet.
It is necessary to immediately determine that an adult CANNOT completely get rid of flat feet. The world is cruel, yeah.
Depending on the degree, different methods of treating or alleviating the symptoms of flat feet are used. In the first, you can get off with simple gymnastics, in the second, you need insoles, massage and gymnastics. With the third, surgery, which guarantees that it will return the arch of the foot to its original form ... well, for 10 years, if that's good.
Therefore, the first thing when we find the first signs of flat feet, we stomp to the orthopedist, he will appreciate the sepia of how your leg parted and tell you what to do.
By the way, about the insoles: do not buy something that is sold for 500 rubles under the guise of orthopedic insoles: they wear out quickly and have an effect of 0. Find out where in your city they make orthopedic insoles according to your individual parameters and stomp there ... Yes, it's expensive, in our city the price tag for such starts from 5000, but believe me, it's worth it.
The same is about gymnastics. Gymnastics for the feet is useful for everyone, it does not take much time, does not require special equipment, you can do it anywhere. As a bonus, it has a good effect on the circulatory system of the foot, which prevents the risk of varicose veins there. You hammer into Google "gymnastics with flat feet" (there are just their whole lards), choose the complex you like and every day, until the end of your life, occasionally changing so that the muscles do not get used, do these exercises 100-200 times each. And you will be happy. Probably.
In addition to all other recommendations, take this one into service: go to the store and buy slippers without a backdrop. a) Heavy and b) 2 larger than your legs. That is, to be great, but not excessively. And wear these sneakers at home. You just need to get used to walking in them constantly.
First and foremost, you need to go to the surgeon to prescribe orthopedic insoles to support the arch of the foot. I can say from my own experience: this is a very necessary thing, walking is much more comfortable.
Second: orthopedic salons sell special rollers, mats for foot massage, which is recommended for flat feet. Example: http://www.ladomed.com/shop/ortopedicheskiye-tovary/gimnasticheskiye-myachi-i-massazhery/massazhnyye-kovriki/massazher-ipplikator-dlya-stupnej-tibetskij-00-180/.