| Правая пятка Пети сильно распухла. | Petya's right heel was badly swollen. |
| Из-за плохой обуви пятки его болели. | His heels hurt from the poorly-made shoes. |
NB When the word пятка functions as a subject and does not have a descriptive modifier, the construction пятка у + Genitive is often preferred to (a) and (b), above: | |
| К вечеру правая пятка у Пети сильно распухла. | Towards evening, Petya's right heel became badly swollen. |
| левая/правая пятка | the left/right heel |
| пятка левой/правой ноги | the heel of the left/right foot |
| пятка на левой/правой ноге | the heel of the left/right foot |