###Human: Why are there inflamed nasal swellings and ear plugs? ###Assistant: Hi. Do not stop Zyrtec (Cetirizine) and nasal corticosteroid spray. The polluted environment around you can harm your children badly. I think that the black plug inside your son's ear is a fungal infection. You need a topical antifungal drop for five days, then the ENT specialist will wash it off, vacuum it. There is a great possibility that all of you have caught an infection from the old grandfather. I recommend immunotherapy for your children if the medical treatment does not help. I also advise you to send nasal smears for laboratory investigation (culture and sensitivity).