An autoimmune condition develops when the immune system, which is meant to defend the body, mistakenly identifies healthy tissue as a threat and attacks it. There are more than eighty recognized autoimmune conditions, from thyroid disease and rheumatoid arthritis to lupus and psoriasis, and they can affect nearly any organ or system. What they share is a pattern of misdirected immune activity that produces inflammation, tissue damage, and symptoms that often come and go in flares.

Because these conditions are complex and highly individual, they benefit from a physician who looks at the whole system. Dr. James Petros, MD, founder of NexGen Health, is board certified in Functional Medicine, Regenerative Medicine, Anti-Aging Medicine, Physical Medicine, and Interventional Pain Management, with training at Tulane University School of Medicine and Stanford. He founded the practice in 2021 on the belief that true wellness is a way of life, backed by rigorous vetting and scientific validation of every therapy offered.

Recognizing the Signs

Autoimmune symptoms vary widely by condition, but several patterns show up again and again. Because symptoms overlap with many other conditions, they are easy to dismiss until they persist or cluster together.

• Persistent Fatigue: deep tiredness that rest does not fully relieve.
• Joint and Muscle Pain: aching, stiffness, or swelling that may move around.
• Brain Fog: trouble with focus, memory, and mental clarity.
• Skin Changes: rashes, redness, or sensitivity that come and go.
• Digestive Trouble: bloating, discomfort, or irregular digestion.
• Recurring Flares: symptoms that flare and settle in unpredictable cycles.

Why Autoimmune Conditions Develop

Autoimmune conditions rarely trace back to a single cause. Genetics create susceptibility, but environmental and lifestyle factors often act as triggers, including chronic inflammation, a permeable gut lining, hidden infections, mold or toxin exposure, nutrient deficiencies, and prolonged stress. These factors frequently stack together and feed one another, which is why symptoms can seem to appear out of nowhere and why understanding the full picture matters more than treating one symptom at a time.

How NexGen Health Can Help

NexGen Health takes a root-cause approach, using advanced testing to identify the inflammation, deficiencies, and hidden triggers behind immune dysregulation. Depending on your results, care may draw on therapies such as peptide therapy, ozone therapy, EBO2 blood oxygenation, exosome IV therapy, and vitamin deficiency testing. This support is designed to complement, not replace, the care of your specialist.

Frequently Asked Questions About Autoimmune Conditions

Can autoimmune conditions be cured?

Most autoimmune conditions are managed rather than cured, but addressing the underlying drivers can meaningfully reduce symptoms and flares and improve quality of life.

What are the most common early signs?

Fatigue, joint pain, brain fog, and skin or digestive changes are common early signals, especially when several appear together or persist.

Do autoimmune conditions run in families?

Genetics can increase susceptibility, though environmental and lifestyle triggers usually determine whether a condition develops.

Why do symptoms come and go?

Autoimmune conditions often move through flares and periods of calm, influenced by stress, illness, diet, and other triggers.

Can lifestyle changes make a difference?

Nutrition, stress, sleep, and gut health all influence immune activity, and addressing them is often part of a comprehensive plan.

Should I still see a specialist?

Yes, root-cause support works best alongside your rheumatologist or specialist, and NexGen coordinates care with your existing providers.

Why Choose NexGen Health

Autoimmune conditions deserve a physician willing to look beneath the symptoms. Under Dr. Petros, NexGen Health combines functional testing with regenerative and anti-inflammatory therapies to support real balance. Located in San Jose and serving Los Gatos, Cupertino, Mountain View, and Silicon Valley, the practice offers an integrative path for patients who have felt unheard.
Understand Your Symptoms in San Jose

If unexplained symptoms point to an autoimmune issue, contact NexGen Health in San Jose to schedule a consultation, call the practice, or book online, and start getting answers.

Disclaimer: The information on this page is for educational purposes and is not a substitute for individualized medical advice, diagnosis, or treatment. Candidacy, therapies, and outcomes are determined during consultation, and individual results vary. Some therapies referenced may be provided on an off-label or investigational basis under physician supervision.