Ear Infection/ Colloidial Silver - yes. I had fluid in my ears in conjunction with a sinus infection. My doctor offered to give me an injection containing a steroid (I believe she said), but I told her I preferred not to have that and I'd see how it went. The next day my ears felt full and plugged up, with mild pain. I imagine they were infected. I sprayed Colloidial Silver in each ear - about 3 sprays in each ear and allowed it to get inside, tilting my head to each side for a few minutes. This alleviated the pain and fullness as well as the dizziness. It started to come back the next day and I repeated the treatment. It did not return.
I have never heard that colloidal silver could not be taken internally. I have used it internally for years. My daughter gives it to her 6 year old! I use it in my ears and eyes when there is a problem. It heals beautifully!