Allergies can vary greatly depending on the climate and environment. Mountains tend to have much cleaner air, usually free of pollen and other allergens. This can be a great relief for allergy sufferers, as the fresh air can help improve breathing and reduce sneezing and nasal irritation. On the other hand, the change in air pressure and temperature can also be difficult for those with allergies, as it can cause symptoms to worsen. All in all, allergies tend to be better in the mountains, but the air pressure and temperature can still cause some issues.