BRIEF ANSWER: TONSILLITIS/SORE THROAT
Can understand your concern..
As per your query it seems that your father may be suffering from TONSILLITIS as it is associated with cold and wheezing
it is more likely to be viral infection..Smoking
should be completely stopped as the cigarette smoke has several chemical agents that causes further irritation to tonsils as well as slows down the process of removal of foreign agents which is main irritating factor to tonsils..
Other thing is that the smoke along with heat adds up to the inflammation and slows down the healing process.
He should quit smoking completely and do warm saline gargles..
If there is severe pain
and inflammation it can be relieved by taking painkillers like Ibuprofen
or Paracetamol(if not allergic).
If there is congestion decongestants containing pseudoephadrine can be used..
Taking hot milk with a pinch of turmeric for three consecutive nights can be relieving..
Drink enough water to keep well hydrated..
AVOID SMOKING COMPLETELY..
If no improvement is seen in next 5 to 6 days he should see a doctor..
Hope your query is solved..
Thanks and regards..
Dr.Honey Nandwani Arora..