I feel like my nostrils show too much, and my tip is has no definition. Would fillers help with this or a alar base reduction?

Based on your photos, you appear to have excessive nostril show. That means that we can see into your nostrils on front view, and there may be retraction or lifting of the nostril margins on both sides, especially if you have a history of previous rhinoplasty surgery. Depending on your examination, microdroplet Silikon-1000 injections may be considered for decreasing your nostril show. This would not, however, lead to a narrower nasal tip appearance. I hope this helps. Sincerely, Dr Joseph

Hello, and thank you for your question! 
Your nose could be improved with fillers, but you need to see the right kind of practitioner.  A doctor who does not perform surgical rhinoplasties cannot possibly understand the structural dynamics of an aesthetic nose.  A plastic and reconstructive surgeon preferably with craniofacial experience has this advantage. 
I have developed a technique of using filler to balance the facial features, referred to as Aesthetic Facial Balancing. 
More recently liquid rhinoplasty’s have been in high demand and it has been a popular topic. I asses each patient individually and what changes in their features would improve their aesthetics most. We find that most patients looking for a surgical rhinoplasty end up being a great candidate for a non-surgical rhinoplasty. This technique that I have created allows patients to get similar results as a surgical rhinoplasty, but with very little recovery time (avoiding residual swelling that can last up to one year) and giving them instant results in less than 20 minutes. I use a hyaluronic based filler that is extremely safe for patients, and most patients are a good candidate for a liquid rhinoplasty. 
I hope this helps!
Wishing you fantastic results,Dr. Rian Maercks M.D.

I recommend getting a formal evaluation with a cosmetic dermatologist to go over your desired results. Facial fillers like Voluma, Restylane, and Juvederm along with Botox can be used to improve the symmetry of the nose and lift the tip; however, surgery would be needed to improve the nostrils or overall shape. See an expert. Best, Dr. Emer