Rheumatoid arthritis (RA) causes joint pain, swelling, and stiffness that typically starts in the small joints of the hands and feet and affects both sides of the body. But it’s more than a joint disease. RA is an autoimmune condition, meaning your immune system attacks your own tissues, and it can produce symptoms throughout the body, from persistent fatigue to dry eyes to lung problems.
The Earliest Signs
RA often announces itself weeks or even months before noticeable joint swelling. Fatigue, a general feeling of being unwell, and depression are frequently the first symptoms people experience. Low-grade fever (around 99 to 100°F) and loss of appetite can also appear in this early phase. These symptoms are easy to dismiss or attribute to stress, poor sleep, or a lingering virus, which is one reason RA often goes undiagnosed for months.
How Joint Symptoms Feel
The hallmark of RA is joint inflammation: swelling, warmth, pain, and stiffness. In the hands, this most commonly shows up at the middle finger joints or where the fingers meet the palm, not at the fingertip joints near the nails. The small joints of the feet, particularly the ball of the foot, are also common early targets. Over time, larger joints like the knees, ankles, shoulders, and elbows can become involved.
RA joint involvement tends to be symmetrical. If your left wrist is affected, your right wrist will likely follow, though one side may be involved first. This symmetry is one of the features that distinguishes RA from other types of arthritis.
Morning stiffness is a key symptom. With osteoarthritis, stiffness after rest typically fades within 30 minutes of moving around. In RA, morning stiffness lasts an hour or longer and can be severe enough that people describe feeling “stuck together with superglue.” The stiffness generally improves with movement throughout the day but returns after periods of inactivity.
RA vs. Osteoarthritis
Because both conditions involve joint pain, people often wonder which one they have. The differences are meaningful. Osteoarthritis is caused by wear and tear on cartilage and tends to affect weight-bearing joints or joints you’ve used heavily over the years. It worsens with activity and improves with rest. RA, by contrast, is driven by immune system dysfunction. It tends to worsen with inactivity and improve with gentle movement. RA joints often feel warm and look visibly swollen, and the pattern of affected joints (small joints, both sides of the body) is distinctive.
Flare-Ups and Triggers
RA symptoms don’t stay constant. They cycle through periods of higher activity, called flares, and quieter stretches. During a flare, pain intensifies, fatigue becomes heavy, and joints stiffen and swell beyond their baseline. Some people describe flare pain as unrelenting, different in quality from their day-to-day discomfort.
Flares sometimes have identifiable triggers. Overexertion is a common one: a day of intense physical activity followed by swollen, painful joints the next morning. Poor sleep, emotional stress, and infections like the flu can also set off a flare. Other times, flares seem to arrive without any obvious cause, which can be one of the more frustrating aspects of living with the disease.
Symptoms Beyond the Joints
Because RA is a systemic autoimmune condition, it can affect organs and tissues throughout the body. These effects tend to develop in people with longer-standing or more active disease, but some can appear early.
- Rheumatoid nodules: Firm lumps that form under the skin, usually near pressure points like the elbows or forearms. They’re the most common extra-joint feature, appearing in about 30% of patients.
- Dry eyes and mouth: About 10% of people with RA develop secondary Sjögren’s syndrome, where the immune system attacks moisture-producing glands. This can cause gritty, irritated eyes and difficulty swallowing.
- Lung involvement: Roughly 10% of patients develop pulmonary complications, though some studies estimate rates as high as 30%. Any part of the lung can be affected, and after cardiovascular disease, lung complications are one of the most serious health risks for people with RA.
Persistent fatigue deserves special mention. It goes beyond normal tiredness. Many people with RA describe a deep, whole-body exhaustion that doesn’t resolve with sleep. It can be one of the most disabling symptoms, sometimes more so than joint pain itself.
What Advanced Disease Looks Like
Without effective treatment, RA can cause permanent joint damage. Chronic inflammation erodes cartilage and bone, leading to visible deformities. In the hands, fingers may drift toward the pinky side, a change called ulnar drift. Fingers can also develop abnormal bending patterns where they bend permanently at one joint while hyperextending at another. These changes affect grip strength and fine motor tasks like buttoning a shirt or opening a jar.
Modern treatment has made severe joint deformity much less common than it once was, but it remains a risk when the disease is poorly controlled or goes untreated for years.
How Diagnosis Works
There is no single test that confirms RA. Diagnosis relies on a combination of symptoms, physical examination, blood work, and sometimes imaging. Doctors look for joint swelling in at least one joint that can’t be explained by another condition, and they score patients across four areas: how many and which joints are involved, whether blood tests show specific antibodies, whether markers of inflammation are elevated, and whether symptoms have lasted six weeks or longer. A score of 6 out of 10 across these categories supports a formal diagnosis.
Blood tests check for two antibodies commonly associated with RA, but roughly 20% to 30% of people with RA never test positive for either one. This is called seronegative RA. Research from the ARCTIC trial found that seronegative RA is not a milder form of the disease. In fact, it can respond more slowly to treatment in the early months, with only 6% of seronegative patients achieving full remission at three months compared to 30% of those who tested positive for antibodies. Over two years, though, joint damage and disease outcomes were similar between the two groups when treated aggressively.
RA-Like Symptoms in Children
Children can develop a related condition called juvenile idiopathic arthritis (JIA). The core symptoms overlap with adult RA: swollen, stiff, painful joints, often worse in the morning or after a nap. But children may also experience eye inflammation, high spiking fevers with a rash, swollen lymph nodes, poor weight gain, and slowed growth. These features are less typical in adults. A child needs to have symptoms of joint inflammation for at least six weeks before JIA is considered as a diagnosis.