My 40 year old special needs son has a pulmonary condition that his doctor is treating. He sleeps with a Trilogy machine and mask for his afternoon nap and at night. When I put his mask on after lunch today I noticed a swelling on the side of the bridge of his nose about the size of small grape. This evening the swelling is about twice that size and reddish in color. He likes to sleep on his right side and sometimes the mask will press against this area of his nose. I don t think it s a stye, it s not on the eyelid, it s between his nose and his eye. I saw the term Chalasion, but it s not on the eyelid. Maybe an infected tear duct? What does this sound like to you?