In this case, allergies are recurrent and very complex. However, in the period of covid19 I was forced to go out with KN95 to the street and it was a magic solution for allergy, in fact in the spring of 2020 (southern hemisphere) I used kn95 a few days at home due to the high levels of pollination and greatly decreased allergy symptoms. You can also try nasal ointment, what that ointment does is trap the particles before they enter through your nose[1], so you rule out air temperature issues and you can confirm that it is a nasal allergy. Another important issue is to know if it is an allergy to pollen from flowers or for example to air pollution. using some kind of sensor for this might be a good idea, or geopositioning to determine if symptoms are greater in urban areas with high density of cars or allergy occurs when you run in a park.
[1] Unguento Nasal | Productos | Salcobrand