The medical term for hay fever is allergic rhinitis. Hay fever is most common in spring and fall, but some people have it all year. You can try to avoid things that give you hay fever. Talk to your doctor if that doesn't help. He or she may prescribe antihistamines, decongestants or nasal sprays.
Histamine causes many allergic symptoms.
For best results, take the antihistamine 30 minutes before going outside. Also, care should be taken when driving and operating machinery since antihistamines can make you drowsy. Decongestants shrink the blood vessels in your nose and do not usually cause drowsiness. Don't use a nasal spray for more than three days at a time unless directed by your doctor. You may become dependent on it.