Arthritis is a broad term that refers to conditions affecting the joints. While many people associate it with simple wear and tear, the reality is more complex. There are over 100 distinct types of arthritis and related diseases, each falling into one of four main categories: degenerative, inflammatory, metabolic, and infectious. Understanding the specific category is the first step in recognizing the symptoms and seeking appropriate care.
Degenerative Arthritis and Inflammatory Arthritis
The most common form is degenerative arthritis, which is linked to physical issues within the joints caused by the breakdown of cartilage. This tissue acts as a protective cushion, but over time it can wear down. When the cartilage is gone, the bones begin to rub against each other. This friction leads to symptoms like joint pain that worsens with activity, stiffness—especially in the morning—and a grinding sound when moving the affected joint. Common types include osteoarthritis, post-traumatic arthritis, and spondylosis. Weight-bearing joints, such as the knees and hips, are frequently involved, but the fingers and the base of the thumb are also common sites.
Inflammatory arthritis works differently. It is not caused by wear and tear, but by an issue with the immune system. The body mistakenly attacks healthy joint tissue as if it were a foreign invader. Because the immune system drives this condition, it can affect multiple joints at once. Symptoms often include swelling and warmth, redness around the joint, fatigue, and a general feeling of being unwell. The most well-known types of inflammatory arthritis include rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis.
The difference between these two categories often comes down to the nature of the pain. Degenerative arthritis typically causes a dull, aching pain that gets worse with use. In contrast, inflammatory arthritis often brings throbbing pain, fever, and appetite changes alongside the joint issues.
Read Also: Podiatrist helps others with obesity and diabetes
Metabolic and Infectious Arthritis
Metabolic arthritis arises when uric-acid crystals accumulate within a joint. These sharp crystal formations develop when uric-acid concentrations in the blood or urine become excessive. Although such crystals are commonly linked to kidney stones, they also play a role in gout, pseudogout and the uncommon basic calcium phosphate deposition arthritis. Individuals suffering from metabolic arthritis show usual signs such as swelling and warmth, along with reduced movement, but the pain is markedly more intense. Even a gentle pressure on the inflamed joint can provoke severe discomfort. Attacks tend to appear abruptly and powerfully, often beginning in the big toe before possibly extending to the ankle, knees or hands.
Infectious arthritis develops when bacteria, fungi or viruses invade the body and target a joint. The bacterium Staphylococcus aureus is the leading cause, though other microorganisms can also provoke serious joint inflammation. These include Streptococci, Neisseria gonorrhoeae, Gram-negative bacilli, Haemophilus influenzae, Borrelia burgdorferi (the Lyme disease agent), Mycobacterium tuberculosis, HIV, hepatitis B and C, and Candida species. The two most frequent types are septic arthritis and reactive arthritis, both presenting with rapid-onset severe joint pain, tenderness on movement or touch, fever or chills, pronounced swelling, warmth, redness, and restricted motion.
Care and Management
Care and management vary depending on the type of arthritis. For degenerative forms, the goal is to lessen pain and boost joint function, typically employing low-impact exercise, hot and cold therapy, and topical or oral pain relievers; corticosteroid injections may also be used to temporarily reduce inflammation. Inflammatory arthritis requires a different regimen aimed at dampening the immune attack on the joint to avert further injury, using disease-modifying antirheumatic drugs, biologic agents, NSAIDs and steroids. Patients often supplement medication with physical or occupational therapy and may rely on assistive aids like braces or canes due to mobility challenges; surgery for an affected joint is an option in the most severe cases.
