At the child of 16 years at walking fingers on one leg or foot strongly crackle. Pains are not present....

[Vladimir]

At the child of 16 years at walking fingers on one leg or foot strongly crackle. Pains are not present.

[Vladimir]

At the child of 16 years at walking fingers on one leg or foot strongly crackle. Pains are not present. Tell from what it and advise what to do or make.
In advance, many thanks.