What Is Arthritis?
Expertly reviewed by Michael J. Greller, MD, MBA, Board-Certified Orthopedic Surgeon | Fellowship Trained in Sports Medicine

Understanding Causes, Symptoms, and Joint Health
Arthritis affects millions of adults and commonly leads to joint discomfort and mobility changes. Even though it is widespread, many people are unsure what arthritis actually means or how it develops. This overview explains the basics so patients across New Jersey can better understand what may be happening inside their joints.
What Does “Arthritis” Really Mean?
Arthritis is a general term for joint inflammation and includes more than 100 related conditions that can affect people at different stages of life. Some forms cause gradual cartilage changes, while others result from immune system activity or past injuries. Because arthritis has many causes, each person may notice different symptoms and experiences.
“Arthritis is a broad term. It can develop after an injury such as a fracture or meniscus tear. It can also stem from inflammatory disease. In each case, cartilage breaks down, stress shifts to the bone, and the joint can progress from early wear to bone-on-bone changes,” says Dr. Greller.
The two types most often seen are:
Osteoarthritis (OA)
Osteoarthritis is the form many people think of when they hear “arthritis.” It develops as cartilage changes over time and may involve joints such as the knees, hips, hands, or spine. OA typically progresses gradually, however can also result from trauma.
Rheumatoid Arthritis (RA)
Rheumatoid arthritis is an autoimmune condition, meaning the immune system mistakenly targets the lining of the joints. This response can lead to inflammation, swelling, and changes in joint structure.
Other forms such as gout, psoriatic arthritis, and post-traumatic arthritis can also influence joint comfort and mobility.
Common Arthritis Symptoms
Arthritis symptoms may appear slowly or suddenly. The experience can differ based on the type of arthritis and the joints involved.
Many individuals describe:
- Stiffness, especially in the morning or after resting
- Joint swelling or warmth
- Discomfort during activity
- Reduced movement or flexibility
Some patients notice difficulty with everyday tasks, such as going up stairs, gripping objects, or walking longer distances. Symptoms often fluctuate. Many people experience “flares,” or periods when the joint feels more irritated than usual. These flares can occur for many reasons and are not always predictable.
How Arthritis Is Evaluated
When arthritis is suspected, a qualified healthcare professional usually begins with a conversation about symptoms, medical history, and how the issue affects daily life. A physical examination follows, which may include checking joint motion, looking for swelling or warmth, and gently assessing tenderness or strength. Imaging such as X-rays can show cartilage changes, bone alignment, or narrowing in the joint space. In some cases, additional tests help clarify whether inflammation or autoimmune activity plays a role. The evaluation helps identify what type of arthritis may be present and how it affects the joint.

Approaches That May Support Joint Health
Arthritis management often focuses on maintaining mobility, reducing discomfort, and supporting joint function. Because each person’s needs are unique, clinicians typically tailor a plan to the individual.
Supportive strategies may include:
- Physical therapy or guided exercise programs
- Over-the-counter medications when appropriate
- Heat or cold for temporary relief
- Activity pacing or ergonomic adjustments
Some individuals also discuss options such as injections or minimally invasive procedures. Decisions about care work best when patients and a qualified orthopedic professional decide together.
Lifestyle Factors That Can Influence Joint Comfort
Daily habits can strongly influence how joints feel. Although lifestyle changes cannot prevent or cure arthritis, they may help support comfort. Low-impact activities such as walking, cycling, or water-based exercise may be helpful for many people.
Simple adjustments like using joint-friendly tools, changing movement patterns, or modifying routines can also make daily activities feel more manageable.
When is it Recommended to see an Orthopedic Specialist?
Many people reach out for guidance when joint symptoms persist, interfere with daily tasks, or impact overall quality of life. Early evaluation may help identify supportive options before symptoms progress further.
Individuals in New Jersey often consult orthopedic specialists such as Dr. Michael Greller for joint concerns involving the shoulder, knee, and hip. His approach centers on education, conservative strategies when appropriate, and individualized care planning.
Frequently Asked Questions
1. Does arthritis always get worse over time?
Not always. The course of arthritis varies. Some people experience slow changes. Others may have periods of stability. A healthcare professional can help monitor progression.
2. Can weather affect arthritis symptoms?
Some people notice stiffness or discomfort with weather changes, although this varies widely. Research on this topic is ongoing.
3. Is joint pain always a sign of arthritis?
No. Joint discomfort can result from many causes, including tendon or muscle issues. Evaluation helps determine the source.
4. Can exercise still be safe with arthritis?
Low-impact activity may support joint function for many individuals. A clinician or physical therapist can help identify safe options.
Serving Patients Across New Jersey
Experiencing pain and looking for orthopedic care near you in New Jersey?
AOSMI supports patients across Freehold, Monroe Township, Toms River, Belmar, and Manalapan, where many individuals search for joint pain evaluation, arthritis guidance, and sports medicine support. To speak with our Physicians Department, call 732-720-2555 for assistance.
Dr. Michael J. Greller is a board-certified, fellowship-trained orthopedic surgeon at AOSMI in Freehold, New Jersey, specializing in conditions of the shoulder, knee, and hip. He is known for a patient-centered, conservative approach and extensive experience in sports medicine, minimally invasive arthroscopy, cartilage restoration procedures, and advanced technologies such as MACI and BEAR ACL reconstruction. Dr. Greller serves as Vice-Chair of Orthopedic Surgery at CentraState and has cared for athletes at multiple levels, including professional teams. His clinical, leadership, and academic roles reflect his commitment to advancing orthopedic care and supporting individuals seeking evaluation for joint concerns in New Jersey.