Why does my nose occasionally run a tiny bit when I’m outside? It never runs when I’m at home.

 It's not uncommon for your nose to run a bit when you're outside, particularly during certain times of the year, such as during allergy season or when it's cold outside. There are several possible reasons why this may occur:

Allergies: If you have seasonal allergies, your nose may run when you're outside due to exposure to pollen or other allergens.

Cold Air: Exposure to cold air can cause the blood vessels in your nose to constrict, leading to a runny nose.

Humidity: Changes in humidity levels can also affect your nasal passages and cause your nose to run.

Exercise: When you exercise, your body temperature rises, and your blood vessels dilate, including those in your nasal passages, which can cause your nose to run.

Environmental Irritants: Exposure to environmental irritants, such as pollution or smoke, can cause your nose to run.

Psychological Factors: In some cases, psychological factors such as anxiety or stress can cause your nose to run.

It's important to note that a tiny bit of runny nose when you're outside is generally normal and not a cause for concern. However, if your nose runs excessively or is accompanied by other symptoms such as congestion, sneezing, or itchy eyes, you may have an underlying allergy or other health condition that requires medical attention.