My son has been having this cough for like three weeks now. It usually occur during his sleep at night alone. He plays around without coughing at all during the day.
We have tried these regular cough syrups and antibiotics, but to no avail.
Anyone here that had similar experience?

Ensure minimal oil in his food and overfeeding hencefoth.

Change the position/pillow he use to sleep.

Remove all Camfor/scents from where he sleep.