Understanding what is happening inside your body is the first step toward feeling better. This Learn hub is a plain-language guide to the conditions and symptoms patients most often ask about, from stubborn weight and hormone shifts to chronic fatigue, gut trouble, and the slow changes of aging. Each guide explains what the condition is, how to recognize it, and what tends to drive it, then points you toward the care that can help.

These guides are reviewed by Dr. James Petros, MD, founder of NexGen Health and a physician board certified in Interventional Pain Management, Physical Medicine, Regenerative Medicine, Anti-Aging Medicine, and Functional Medicine. A graduate of Tulane University School of Medicine with postgraduate training at Stanford, Dr. Petros built NexGen Health in 2021 on a simple belief, that true wellness is a way of life. The practice pairs plain answers with personalized, science-driven care in a luxurious Silicon Valley setting.

Explore the conditions below to understand what you are experiencing, then connect with the team to talk through your options.

Conditions and Symptoms We Cover

• Autoimmune Conditions: when the immune system mistakenly attacks healthy tissue.
• Weight Loss With GLP-1 and Reta: understanding weight as a metabolic condition.
• Hair Restoration: why hair thins and what shedding signals.
• Anti-Aging and Bio-Optimization: the changes behind how we age.
• Regenerative Aesthetics: how skin loses firmness, texture, and glow.
• Gut and Digestive Health: recognizing GERD, SIBO, and IBS.
• Hormone Imbalance, Perimenopause, and Menopause: the symptoms of shifting hormones.
• Insulin Resistance and Metabolic Dysfunction: the quiet start of blood sugar problems.
• Chronic Fatigue: the many reasons behind lasting exhaustion.
• Sleep Issues and Poor Sleep: what disrupts deep, restorative sleep.
• Chronic Inflammation: the low-grade fire behind many conditions.
• Immune System Support: what weakens the body’s natural defenses.
• Lyme and Mold-Related Illness: complex, often overlooked chronic illness.
• Healing and Injury Recovery: why some injuries are slow to heal.
• Sexual Health and Erectile Dysfunction: the physical roots of intimacy concerns.
• Anxiety and Depression Support: how physical health shapes mood.
• Cognitive Decline, Focus, and Memory: what affects mental sharpness.
• Sleep Apnea: the breathing disruptions that steal your rest.

To talk through your symptoms and next steps, contact NexGen Health in San Jose to schedule a consultation with Dr. Petros and the clinical team.