Hi, welcome to the forum, you are having allergic response to some unknown allergen. The allergens or triggering factors like dust, fog, pollens etc. can cause the precipitation of these symptoms. These symptoms are exaggerated esp. in winter or cold environment.
Sneezing is a protective reflex which occurs secondary to exposure to the irritant or allergen, which helps to blow out the irritant. In some individuals there will be Airway hyperresponsiveness due which there can be either allergic rhinitis (mild to severe form) or asthma.
There is particular neuronal mechanism exists. When ever you are exposed to allergen there will be release of histamine, this is responsible for sneezing first and then followed by further release of histamine in the skin leading to itching. The order may differ from individuals to individuals.
You need to identify such allergen and prevent further exposure. This measure is sufficient as you have milder form of allergy. I suggest you to consult allergy specialist. Take care and regards.
Thanks for information.
I will see doctor some day but right now I don't have any insurrance nor money so while symptoms aren't worsened I'll just try to avoid dust (though quite impossible since I literally live in dust pile) and newspapers and be more outside, I found that fresh air helps itchy nose.