How to get relief from a blocked nose due to allergies?

Pills or sprays: You can try an over the counter antihistamine pill which you can take once a day. If you want short-term relief, you can use oxymetazoline nasal spray for a maximum of 3 days. If you use it longer, you will run the risk of rebound congestion. You can see your doctor who can also prescribe steroid nasal sprays, antihistamine nasal sprays, and allergy pills. Saline irrigation may be helpful.