Painful Pimple On Corner Of Mouth. I recommend that you apply bacitracin or neosporin ointment once a day leave the spot alone and photograph it in case you want to show the photo to your dermatologist at some point. The technical term for the areas affected are the labial commissures.

At first I thought it was a cold sore and I tried using abreva and later other cold sore topical medications regularly but after seeing no improvement I eventually stopped using them. On the other hand canker sores have a variety of causes. The causes of pimples around the mouth arent so different from the causes of pimples on the rest of your face factors like hormones and diet may play a role.
If it is truly a pimple it is bacterial and either infection in the gland in the corner of your mouth or on the skin near the corner.
Large Fordyce spots are sometimes confused with pimples and can also occur at the angle of the lips. The sore in the corner of the mouth is a very common condition and happens to people regularly. Pimples in the mouth can appear as bumps sores or lesions. I recommend that you apply bacitracin or neosporin ointment once a day leave the spot alone and photograph it in case you want to show the photo to your dermatologist at some point.