My 2.5 year old daughter has been stuffy for over a month. she has not had a fever or atypical behavior. should i be concerned?

Allergies: She probably has allergies if she is otherwise acting healthy- ie eating, playing, sleeping well. However there is a small chance that she has a foreign body ( like a bead or other small toy) up her nose- though usually by now the mucus would be green. Take her to the pediatrician if the symptoms persist or worsen.

Allergy/objectinside: Could be allergies. Also possible that she stuck something in her nose (very common at this age!) check in with your pediatrician.