There is a cough-ear reflex, but only 2.3% of the population experience it.

There's something called Arnold's nerve, part of the vagus nerve, which supplies the head and neck.

It also supplies the back and lower floor of the external auditory canal, which is the tube towards your inner ear.

If stimulated, this nerve can provoke a coughing reflex.

Although 2.3% of people experience this in one ear, only 0.6% get it in both!