Do symptoms like rhinitis go away quickly?

No. Depending on the cause, can take days to months, or never.
Depends on cause. When rhinitis is caused by a viral infections symptoms last 5-7 days. For rhinitis caused by allergies symptoms persist as long as exposure continues. So allergic rhinitis without treatment can last hours to days to weeks to months depending on the cause.

Related Questions

Do symptoms like allergic rhinitis go away quickly?

Depends... On the level of allergy and duration of exposure. If you're mildly allergic to dust mites and you have a brief pillow fight, you might sneeze for a few minutes. If you're highly allergic to cats and spend the weekend in a house with five cats, you might sneeze and have itchy, watery eyes for a few days. Read more...