Colloidal silver is a powerful antibiotic. Before there were antibiotics, there was silver, and it still works today.
You can drink it or use it on your skin. I do both depending on what I need. If I have a cold or allergies, I will drink a teaspoon or two. My chiropractor turned me on to it. If I have a cut, I'll put a drop on it, and it helps it heal quicker and prevent infection.
That led me to experiment with it on the skin between my eyebrows where I have a tendency to red, bumpy skin from rosacea. I figured if an antibiotic like Metrogel works, perhaps this will work, too. I put a drop in my palm and then pat that on my face. It doesn't burn like Metrogel does.
It seemed to calm down my skin without causing redness or itching or burning. I continue to use it daily because it's so easy to use and I have it around for cuts anyway. I'm not sure if I think it's a permanent cure yet, but it seems to be no better or worse than anything else I have tried.
If you want to try it, you can get silver at health food stores. It comes in a dark bottle because sunlight exposure will deactivate it. It looks like water inside, and it also tastes just like water. Buy a brand that makes it a very small PPM size (particles per million), like 10 PPM. The evidence so far shows that the smallest particle size is the most effective on a cellular level.
You could even make your own. I've seen colloidal silver machines sold online for around $300. If you go that route, make sure the machine makes a tiny particle size because that is safer and more effective than larger molecules. The reason you might do that is that the ready-made solutions in the store are expensive, about $30 for 8 oz. But if you're using just a few drops a day for your skin, investing in a machine is probably unnecessary.
I have tried the nasal spray with silver for a sinus infection, and it worked in two days. I use it routinely for cuts and scrapes instead of antibacterial ointments or sprays, and it works better with no stinging.
I also drink some when I'm having seasonal allergies (which now seems to be year-round so perhaps it is actually my dog I'm allergic to). I have also rinsed my mouth with it when I had a cut in my cheek.
You will hear about how silver will turn you blue over time if you drink it, but that's plain silver, not the colloidal form. That blue skin phenomenon is called "argyria." If you get the smallest size particles, that won't happen to you, and it certainly won't happen if you're just using it on your skin.