What is this dark line across my nose? Is it 'melasma'? (Photo)

Hi Chrissie.  It's hard to say from the photos, but Melasma has a fairly distinct pattern that does not normally look like your photo. Yes it sometimes appears on the nose, but not typically in a thin straight line.  It's more likely that it's from an old injury that never completely healed.  To remove the color, we would use q-switched lasers or high strength hydroquinone.   To see examples of scar removal before and after photos in Los Angeles, click on the link below.

Thank you for your question, Melasma needs a combination approach to get the best improvement and will need a series of treatments. In our practice, we combine Clear + Brilliant, peels, microneedling/PRP, Aerolase, and sometimes Erbium (Cool Laser) to get the best results. See an expert for a formal evaluation. Best, Dr. Emer

Skin discoloration is a very prevalent problem in women over the age of twenty.  It is also increasingly common in men with increased sun exposure, but mainly occurs in women. 
Risk factors include thyroid disease, sun exposure, hormones, pregnancy, family history, PIH, and birth control. Melarase AM and Melarase PM have been extremely effective in reducing pigmentation associated with skin discoloration and hyperstimulation of melanocytes. 
In my practice, patients with hyperpigmentation benefit from twice daily application of the creams. Melarase AM in the morning, followed by Melarase PM in the evening. Melarase AM contains four active sunblocks, so additional sunscreen is not needed unless your sun exposure is very high or you had a recent procedure/laser. SPF of 30. Melarase PM contains active skin lighteners to even out skin pigmentation. If you are concerned about the development of pigmentation, contact our office to discuss details and to obtain a regimen for Melarase. 
Laser therapy works but must be combined with a therapeutic topical program before and after therapy. 
Recommendations:  5-step Daily Brightening Kit has everything you need to improve dark spots, skin discoloration, melasma, and hyperpigmentation caused by sun exposure, hormones, scarring, and the environment. It’s a powerful daily brightening kit that can help bring out your skin’s natural, healthy glow. Ideal for use on the face, neck, and hands. 
Includes: Melaclenz, Melapads, Melarase AM, Melarase PM, Elevase, and Spectrase
Best, 
Dr. Karamanoukian
#Realself100 Surgeon