It's possible to treat the symptoms of mild allergic rhinitis with over-the-counter medications, such as long-acting, non-sedating antihistamines. If possible, try to reduce exposure to the allergen that triggers the condition. See preventing allergic rhinitis for more information and advice about this.
isobar definition: 1. a line on a map connecting points having equal barometric pressure at a given reference altitude, commonly sea level, over a given period or at a given time 2. any atom that has the same atomic weight (or mass number) as another...
Surface maps of isobars are useful for locating areas of high and low pressure, which correspond to the positions of surface cyclones and anticyclones. A map of isobars is also useful for locating strong pressure gradients which are identifiable by a tight packing of the isobars.