What is the result of an untreated ear infection over time?

Bad news: You can rupture the tympanic membrane it may not heal and you will be deaf. The bacteria could go to the brain and then you are going to have a real serious medical problem including chance of death from sepsis

Left unteated: sinus or brain infection, possible death. I strongly advise an exam and therapy.

Depends: This depends on the type and location as well as the germs involved. People had these in the years before antibiotics and survived, and most would today. They can trigger other problems, but most people with a normal immune system would heal over 3 months, but recurrent infection might lead to significant hearing loss. A few would suffer no long term problems past the pain/problems during infectio