Hi, in my opinion I also would suggest you to go for intravenous antibiotics, because Mastoid infection
or any bone infection
cit is difficult to treat with oral antibiotics
as the dosage of medicine in tablet forms will be less.
To treat mastoid infection we definitely have to give intravenous antibiotics.
By taking oral antibiotics you are just giving insufficient medicine to refuce infection and also prolonging the recovery.
Mastoidits can complicate with the spread of infection to the inner ear
Once the infection is treated, rinhing will gradually reduce.
So in my opinion I would advise you to follow your new ENT doctor and go for intravenous antibiotics.