Hello Dr, I have a pressure and ache in my sinus that started today. I was looking in my nose and noticed that my right nostril has a swollen red lump?

Can't tell but. it is likely just the lower (inferior turbinate). If the area is not sore, that it is likely a cold or allergy (spring pollen if you have allergic problem in the past). If you are unsure, it is best to get your doctor to take a look at the area since in this case a million words do not make a picture.