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What are Common Symptoms of Autoimmune Diseases? Insights from a Rheumatologist

Jun 7, 2026 | Healthcare

Autoimmune diseases can affect the body in many ways. These conditions occur when the immune system mistakenly attacks healthy tissue, which can lead to inflammation, discomfort and a wide range of symptoms, depending on the part of the body involved.

Because autoimmune symptoms can sometimes come and go, or overlap with other health concerns, it is not always easy to recognize when something more serious may be happening. Below, our rheumatologists will discuss some common symptoms that may be associated with autoimmune diseases, and we’ll also explain why a professional evaluation can be important when symptoms persist.

Fatigue that Does Not Improve Easily

Fatigue is one of the most common symptoms reported by people with autoimmune conditions. This is not the same as simply feeling tired after a busy day. Autoimmune-related fatigue may feel more persistent, more intense or more difficult to improve with normal rest.

For some people, fatigue may interfere with work, daily routines, exercise or social activities. While fatigue can have many possible causes, ongoing exhaustion combined with other symptoms may be a reason to speak with a healthcare provider.

Joint Pain, Stiffness or Swelling

Many autoimmune diseases can affect the joints. Some people notice pain, stiffness, swelling, warmth or reduced range of motion. These symptoms may be more noticeable in the morning, after periods of inactivity or during flare-ups.

Patients sometimes see a rheumatologist when joint symptoms become persistent, unexplained or begin affecting daily movement. A medical evaluation can help determine whether joint discomfort may be related to inflammation, injury, arthritis or another underlying condition.

Skin Changes or Rashes

Autoimmune diseases can sometimes affect the skin. Some people may develop rashes, sensitivity to sunlight, skin discoloration, sores or patches of irritated skin.

Skin symptoms can vary widely depending on the condition. In some cases, a rash may appear alongside other symptoms, such as joint pain, fatigue or recurring fever. Because skin changes can have many possible causes, it is important to avoid assuming they are connected to an autoimmune disease without proper evaluation.

Recurring Fever or General Illness

Some autoimmune diseases may cause recurring low-grade fevers or a general feeling of being unwell. These symptoms can sometimes occur during periods of increased inflammation.

Common symptoms that may appear together include:

  • Fatigue
  • Joint or muscle discomfort
  • Fever that comes and goes
  • Skin changes or rashes

When these symptoms continue or return repeatedly, a healthcare provider may recommend additional evaluation.

Muscle Pain or Weakness

Muscle aches, weakness or tenderness also may occur with certain autoimmune conditions. Some people may notice difficulty with daily activities that previously felt manageable, such as climbing stairs, lifting objects or getting through normal routines.

A qualified rheumatologist can review muscle-related symptoms alongside other health concerns to determine whether further testing or specialist care may be appropriate.

Digestive or Whole-body Symptoms

Although rheumatologists often evaluate joint and inflammatory symptoms, autoimmune diseases can sometimes affect multiple areas of the body. Depending on the condition, some people may experience digestive problems, dry eyes or mouth, numbness, swelling or changes in overall energy levels.

Because autoimmune diseases can look different from person to person, tracking symptoms over time can be helpful. Noting when symptoms appear, how long they last and whether they occur with other changes may provide useful information during a medical visit.

Symptoms Can Come and Go

One reason autoimmune diseases can be difficult to identify is that symptoms may not be constant. Some people experience flare-ups followed by periods where symptoms improve or become less noticeable.

An experienced rheumatologist can help evaluate patterns of inflammation, symptom history, lab results and other clinical findings to better understand what may be contributing to ongoing concerns.

When Should you Schedule an Evaluation?

Occasional aches, fatigue or skin irritation do not always indicate an autoimmune condition. However, persistent symptoms, recurring flare-ups or multiple unexplained symptoms happening together may be worth discussing with a healthcare professional.

A timely evaluation can help patients better understand what may be causing their symptoms and whether additional testing, monitoring or specialty care is needed.

Looking for a Rheumatologist?

Autoimmune disease symptoms can vary, but persistent fatigue, joint pain, swelling, rashes, recurring fever and muscle discomfort may be signs that further evaluation is needed. If you are experiencing ongoing or unexplained symptoms, a professional rheumatologist can help assess your concerns and determine the next steps.

At 219 Health Network, we provide specialty care for patients. Contact us to schedule an appointment and learn more about our rheumatology services.