From the description you have given seems to me that your father was applying iodine tincture to your tonsils – a collection of lymph glands at the back of your mouth.
These have a tendency to swell with viral infections, especially in young children. Up until 30 years ago there was a fad for removing enlarged tonsils surgically.
This procedure is now not thought to be useful except in those with repeated and recurrent infections not responsive to antibiotics.
Anyone with a cold or flu can experience enlarged tonsils and this can lead to sore throats. The A.Vogel remedy you can use to combat this symptom is our Echinaforce® Sore throat spray – made from Echinacea as well as Sage.