Dent in my nose that keeps getting bigger, what are my options? (Photos)

It looks like the tip cartilages have a gap between them. There are two ways to go about it. 1.  Tip rhinoplasty where the gap is surgically closed. This is permanent.  2.  Non surgical rhinoplasty where filler is used to fill in the gap. This is the fastest way, but is not permanent. If you wanted a quick fix for an event this might be your best option. Good luck! 

Yours is the typical cleft nose, which essentially is the same than a boxy tip with the relevant difference of the absence of the interdomal fibrofatty tissue between the cartilagenous domes in the cleft tip.Solution of the squaredness is domal plication and plasties, as well as trimming out the excess of cephalic excess. If this tip work only is bound to be performed this could be done under locar and a slight sedation; however, I recommend you revise the entire nose to achieve a better balanced rhinoplasty.If before the cleft was not present and the nose was boxy then means for some unknown reason your interdomal fibrofatty tissue has dissapeared; might be the medication taken is behind this phenomenon, or other idiosincratic issues with your adipous deposits.

The diet you see is the space between the to lower cartilages of your nose, where they ordinarily come together at the tip.  In some patients like you, there's a space between the two.  The treatment can be to fill the space with a filler (nonsurgical rhinoplasty), and you'll have a temporary improvement.  For a permanent improvement, you would consider a tip rhinoplasty surgery.  Be sure to discuss your goals and concerns with your board certified plastic surgeon and consider the pros and the cons. Be certain your surgeon is properly certified.  I've attached a link where you can start your search. 

Hello and thank you for your question. Based on your
photograph, you may benefit from a tip refining rhinoplasty, which can help close the cartilage gap. Your surgeon can
accomplish this by trimming, suturing, and reshaping the cartilage in your
lower nose.  Make sure you specifically look at before and after
pictures of real patients who have had this surgery performed by your surgeon
and not just a computer animation system. The most important
aspect is to find a surgeon you are comfortable with. I recommend that you seek
consultation with a qualified board-certified plastic surgeon who can evaluate
you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

You posted a photo of the tip of your nose showing a dent. The gap in the middle of the tip id called a bifid tip. This is spreading out of the horseshoe shaped tip cartilages. As they separate the dent gets wider. This can be treated during rhinoplasty. The reason it got worse after Accutane is thinning of the thick oily skin by the medication made the skin over this already existing anatomic situation. Thick skin hides many cartilage flaws but also doesn't allow a delicate refined nasal tip. This can be treated at the same time as repairing your deviated septum.

While it is possible to have a dent in the nose that is a result of trauma and deviated septum, an exam in person would be required to know for sure. A well performed rhinoplasty can usually make a big improvement in irregularities like this because the cartilage can be grafted, reshaped, or sutured to make the contour much better. Be sure to see a rhinoplasty specialist for consultation.