It is not an idiom, it means your nose is itching.
bring her to the vet if you think its really bothering her she could just be cleaning her nose which makes it go red
It means someone is thingking about you.
When histamine is released into the body, it can cause swelling, itching, bronchi constriction, watery eyes, and a runny nose. It can lead to anaphylaxis in severe cases.
It is the present participle form of a verb (I am itching to get moving). It can be used as a noun (The itching is driving me mad) or an adjective (her itching nose kept her awake).
you need better hygiene.
Like any other white hair a white nose hair is caused by stress or aging. The cause of white hair is when the blood cannot flow thoroughly to the area to create the pigments. White hair in the nose could be safely removed.
Histamines cause many of the standard allergic responses: itching, sneezing, runny nose, etc. Antihistamines block histamines from binding on their receptors in the body.
Superstition says an itching nose means you are going to kiss a fool.
This could be allergies.
does hiv cause nose bleed
Usually it is sinus pressure. Another cause could be as simple as a cut in your nose or something stuck in your sinus or nasal cavity.