Yes, they look (and sometimes feel) like medieval torture devices, but they really help. While they won't treat your allergies (since they're not medicated), they can help rinse the pollen and mucus out of your nose.
The neti pot is more of a slow stream of water and saline solution that goes in one nostril and out the other. If that sounds horrible to you, you might prefer the sinus rinse, which is a squeeze bottle that you squirt up one nostril with a little more pressure, so the whole process is over more quickly. Just make sure you're only using distilled, filtered, or previously boiled (and then cooled) water.
"It's not a pleasant thing to do, but if you can do it on a daily basis you really do see a difference," says Hartog. Full disclosure: This is something that can feel absolutely disgusting, mildly uncomfortable, or incredibly satisfying based on the person. But when allergies are ruining your life, you'll shove just about anything up your nose to feel better.