2 months post alar base reduction: is this lump scar tissue or muscle? (Photos)

You have to give yourself some more healing time.  Your nose and surrounding areas are going to be swollen for a while and you should be consulting the surgeon that performed the procedure but give yourself some time before going back in so some of it can subside. It can take up to a year for final results.
Sincerely,
Philip J. Miller, MD, FACS Double Board Certified Facial Plastic Surgeon

Thank you for your question. You are in the early stages of your healing process. Please remain patient, follow the recovery guidelines and review any recovery protocol like this with your board certified facial plastic surgeon.
Best wishes,

It's still too soon to tell what your final results will be. You need to have patience with your body as it begins to heal. The skin, bone and cartilage are all traumatized during surgery. Inflammation (swelling) is the normal response and will help your nose to heal and look beautiful in the end. If, one year from now, you are unhappy with your nose, then that is the time to think about a revision procedure. Right now, concentrate on other things you like to do and let your nose take its time to heal. I hope this helps.

Alar base reduction always produces an external skin scar. The appearance of the scar will change over time. Often it will become thickened, red, and itchy between 6-12 weeks before fading into pale line well camouflaged in the shadow of the alar groove. Your photos do not demonstrate anything of concern at 2 months following surgery. Nevertheless, I suggest you see your surgeon to express your concerns.

This area heals differently in individuals.  You appear to have some hypertrophic scarring.  Treatment with very low dose steroid, 5 fluouracil or ideally a combination of the two may be beneficial. Any surgeon who does rhinoplasty will be aware of these modalities