Both of those fall under different groups of inflammatory arthritis - this type of arthritis does present with swelling. The pain is typically described as a stiffness that improves with activity - hence it tends to be the worst in the AM or after a long car ride for example. The swelling you have is interesting to me but the character of your pain is a little atypical and the overall picture does not seem to clearly fit inflammatory arthritis.The causes for facial flushing are many - ranging from menopause to thyroid issues. Typically we shoot for a unifying diagnosis but certainly could be more than one - time for a doctors visit!
I did see that come across...thank you for easing my mind! I keep coming across rheumatoid arthritis and psoriatic arthritis as well. It's just very difficult to identify whether I have a few different things possibly that just happen to be displaying all together (ie. a genuine food/medication allergy combined with lower body pain from lower back nerve issues, etc). Although i do notice that I have periods of clear skin and minimal discomfort all around, and then it'll transition to a week or two or increased skin redness and sensitivity. The swelling is unfortunately something I'm seeing everyday though.