To find out what caused them, you need to undergo a full medical examination, and only by its results can you judge the causes of the ailment.
Ukuze uthole ukuthi yini kwaba isizathu nesenzakalo yabo, kumele ahlolwe ngokugcwele wezokwelapha, futhi kungaba bayokwahlulelwa izimbangela zesifo kuphela ngemiphumela yako.