Joint pain, stiffness, swelling, and skin discoloration around a joint are the four hallmark signs of arthritis. If you’re noticing one or more of these, especially if they’ve persisted for several weeks, there’s a reasonable chance arthritis is the cause. But “arthritis” isn’t a single disease. It’s an umbrella term covering more than 100 conditions, and figuring out which type you might have starts with paying close attention to your specific pattern of symptoms.
The Core Symptoms to Watch For
Arthritis pain doesn’t always feel dramatic. Early on, you might notice a dull ache after using a joint, stiffness when you wake up, or mild swelling that comes and goes. These symptoms sometimes arrive in waves called flares, where a joint feels worse for days or weeks before settling down. Other times, the discomfort is constant but low-grade, easy to dismiss as “just getting older.”
Pay attention to four things: pain in or around a joint, reduced range of motion (you can’t bend or straighten as far as you used to), visible or palpable swelling, and any redness or color change over the joint. Stiffness that shows up after sitting still for an hour or more is particularly telling. If you’re experiencing a combination of these in the same joint for more than a few weeks, that’s a meaningful signal worth investigating.
How Different Types Feel Different
The pattern of your symptoms can reveal a lot about which type of arthritis you may be dealing with.
Osteoarthritis
Osteoarthritis is the most common form, caused by gradual cartilage breakdown. It tends to affect joints you’ve used heavily over your lifetime: knees, hips, hands, and the spine. Morning stiffness is usually mild and clears up within a few minutes of moving around. Pain typically worsens with activity and improves with rest. You might also notice a grinding or crackling sensation, called crepitus, when you move the joint. Over time, bony enlargements can form at finger joints, creating visible knobs.
Rheumatoid Arthritis
Rheumatoid arthritis is an autoimmune condition where your immune system attacks the lining of the joints. The key difference from osteoarthritis is the stiffness pattern. Morning stiffness in rheumatoid arthritis lasts an hour or longer, sometimes much longer. It also tends to affect joints symmetrically, so if your left wrist is involved, your right wrist often is too. Small joints in the hands and feet are frequently the first to be affected. Fatigue and a general feeling of being unwell often accompany the joint symptoms.
Psoriatic Arthritis
If you have psoriasis or a family history of it, joint pain may point to psoriatic arthritis. This type has some distinctive features. Fingers or toes can swell into a puffy, sausage-like shape, a phenomenon called dactylitis. Fingernails and toenails may develop tiny pits, become brittle or crumbly, or start lifting away from the nail bed. You don’t always have visible skin plaques before joint symptoms appear, which can make this type harder to recognize on your own.
Gout
Gout hits fast and hard. It often strikes a single joint, most classically the base of the big toe, with sudden intense pain, redness, and swelling that can peak within hours. Attacks frequently start at night. Between episodes, you may feel completely fine. Gout is caused by uric acid crystals building up in the joint, and it behaves very differently from the slow, progressive pattern of osteoarthritis.
What a Doctor Looks for During an Exam
A physical exam is the starting point of any arthritis diagnosis. Your doctor will inspect each symptomatic joint for redness, swelling, deformity, and warmth. They’ll gently press along the joint line to locate tenderness and determine whether swelling feels like fluid buildup, thickened tissue, or bony enlargement. These distinctions matter because each points toward a different type of arthritis.
You’ll be asked to move the joint through its full range on your own, then the doctor will gently move it for you. If you can’t move it far yourself but the doctor can push it further, that suggests pain or weakness is the limiting factor. If neither of you can move it fully, there’s likely a structural problem like scarring, cartilage loss, or bone changes. The doctor will also feel and listen for crepitus, that grinding sensation produced by roughened cartilage surfaces moving against each other.
One important detail: if pressing on and moving a joint doesn’t reproduce your pain at all, the pain may actually be referred from somewhere else, like a hip problem causing knee pain, or a spine issue mimicking shoulder pain.
Blood Tests and What They Reveal
Blood work can’t diagnose every type of arthritis, but it’s essential for identifying inflammatory and autoimmune types. Two markers help measure how much inflammation is present in your body: one tracks how quickly red blood cells settle in a tube (a sign of inflammation when it’s fast), and another measures a protein your liver produces in response to inflammation. Neither is specific to arthritis, but elevated levels alongside joint symptoms strengthen the case.
For rheumatoid arthritis specifically, doctors look for two types of antibodies. Rheumatoid factor is a protein the immune system produces when it mistakenly attacks healthy tissue. The anti-CCP test looks for a related antibody that’s more specific to rheumatoid arthritis. Having both positive results makes a diagnosis more certain, but some people with rheumatoid arthritis test negative for both, especially early on.
A complete blood count helps rule out other causes of your symptoms and checks for anemia, which is common in people with inflammatory arthritis. For suspected gout, a blood test measuring uric acid levels is standard, though levels can sometimes be normal during an active attack.
Imaging: What X-rays and MRIs Can Show
X-rays are usually the first imaging test ordered. They show bone clearly and can reveal the classic signs of osteoarthritis: narrowing of the space between bones where cartilage has worn away, bone spurs forming at the edges of joints, increased bone density where cartilage used to be, and fluid-filled cysts within the bone. These changes indicate cartilage loss has progressed enough to alter the bone itself.
The limitation of X-rays is that they can’t show cartilage directly, and they miss early-stage disease. That’s where MRI comes in. MRI is far more sensitive and can reveal subtle cartilage damage, fluid buildup inside the bone marrow, and inflammation in the soft tissues surrounding the joint. It catches changes well before they’d appear on an X-ray, making it valuable when symptoms are present but X-rays look normal.
Ultrasound is sometimes used to check for fluid-filled cysts near joints or to evaluate tendons and ligaments. For gout, a special type of CT scan or ultrasound can detect uric acid crystal deposits in the joint. The gold standard for confirming gout, though, involves drawing fluid from the swollen joint and examining it under a microscope for crystals.
Tracking Your Symptoms Before Your Appointment
Before seeing a doctor, tracking your symptoms for a week or two gives you useful information to share. Note which joints hurt, when the pain is worst, how long morning stiffness lasts (time it with a clock, because the difference between 10 minutes and 60 minutes matters diagnostically), and whether symptoms are on one side or both. Record what makes the pain better or worse, and whether you’ve noticed any swelling, redness, or warmth.
Clinicians use standardized questionnaires to assess how arthritis affects daily life. One widely used tool scores three dimensions: pain, stiffness, and physical function across 24 questions. A quicker version called RAPID3 combines physical function, pain level, and your overall self-assessment into a score that takes just seconds to complete. You can find versions of these online and fill them out before your visit. They help establish a baseline, and tracking your scores over time shows whether you’re getting better or worse.
Think practically about what you can and can’t do. Can you open jars? Climb stairs without pain? Walk two miles comfortably? Get dressed without difficulty? These everyday benchmarks are scored on a 0 to 3 scale (no difficulty, some difficulty, much difficulty, unable to do), and they paint a clearer picture than simply saying “my joints hurt.”
Signs That Need Urgent Attention
Most arthritis develops gradually, but certain combinations of symptoms need same-day medical evaluation. A joint that is red, hot, swollen, and extremely painful, especially if you also have a fever, could indicate septic arthritis, a joint infection that can cause permanent damage quickly. This is a medical emergency.
A high fever accompanied by a rash alongside joint symptoms also warrants urgent care, as it may signal a systemic inflammatory condition. Sudden, severe swelling in a single joint with no history of injury should be evaluated promptly, whether the cause turns out to be gout, infection, or something else. The key distinction is speed: arthritis that builds over weeks is worth scheduling an appointment for, but a joint that becomes acutely inflamed over hours needs faster attention.