Shreya Darji is being kept under video surveillance by specialist medics in Ahmedabad in an attempt to solve the medical mystery.
The insects, which first appeared last year, have continued to emerge despite attempts to kill them with antiseptic, according to the Toronto Sun.
“The girl’s case is very challenging for me, as I have never seen such a case, nor found it in medical history,” Dr Jawahar Talsania told the Times of India.
“The big ants must be biting her, but the girl did not even feel pain inside her ears. Besides, there was no damage inside her ear.”