Will injury to nose cause droopy nose tip? I still have swelling after 4 weeks

Thanks for the question. I recommend you to have a personal consult for better advices or send your photos to give you recommendationsKind regards 

Thank you for your question.  Unfortunately, swelling to the nose takes more than just a few weeks to resolve. Please be patient and allow the swelling to resolve and see if permanent damage due to trauma has been made. Consult a Board Certified plastic surgeon to evaluate you and offer possible options to correct if that's what is needed. Best wishes, 

without seeing any pictures or knowing the degree of your injury, it's hard to say. That being said, it's unlikely that it will cause a droopy tip as a great majority of nasal injuries do not cause one. However, injury to the supratip area and continued swelling can lead to the appearance of a fallen tip. My advice to you would be to be examined as that will give you the most accurate answer. Sorry to hear about your injury - best of luck! 

I suppose anything can happen, but I am not sure what the nature of your question is related to. Is this after or before surgery?

It is hard to give you a definite answer. Usually injury does not make the nose droop but if the nose is broken and has changed shape there can be the illusion that it is drooping. The bottom half of the nose is cartilage and usually is pretty resistant to injury, unlike the bone on top. I think it is best to see an ear nose and throat doctor or facial plastic surgeon to determine whether it was broken and what your future options may be. Hope that helps!