This isn’t a little redness; this is swollen to the extreme. Your joints will be enlarged, red, tender, and, of course, painful. This “flare up” won’t be just a freak occurrence but more than likely a daily thing. So this is one of the signs of rheumatoid arthritis that will not be able to go unnoticed, period.
This is one of the signs of rheumatoid arthritis that may be hard to pick up on as you may just pass it off as just being the usual “flu.” However, be sure to take notice of the length of the flu and other possible flu-like symptoms. If it is, in fact, just the flu, then it should pass in time and not return too frequently. On the other hand, if it is a fever brought on by RA and accompanies other signs of rheumatoid arthritis, you should check with your doctor for a diagnosis.
Glands may start to swell for no apparent reason. If there is no other cause (that you know of), then it is indeed possible you could be suffering from RA. As usual, take into account if you are experiencing other signs of rheumatoid arthritis, so you don’t make a false diagnosis and scare yourself into unnecessary treatments.