Chest Pain
Cardiac, pulmonary, musculoskeletal, digestive, and anxiety causes explained. Includes a clear guide on when to call 911 and what to do while waiting.
Potentially urgent
12 min read
Symptom Guides A–Z
Understanding what a symptom means — its possible causes, its urgency, and when to act — is one of the most valuable things you can do for your health. Our guides help you navigate that decision confidently.
These guides are informational — not a substitute for medical assessment
If you are worried about a symptom, please consult a qualified healthcare provider. If you believe you are experiencing a medical emergency, call 911 immediately.
Available Now
Symptom guides
Fatigue & Chronic Tiredness
14 medical causes with diagnostic tests, 4 mental health causes, lifestyle factors, ME/CFS, Long COVID fatigue, and a management evidence table.
See doctor if >2 weeks
13 min read
Headache
Tension, migraine (with 4-phase guide and all CGRP therapies), cluster, and dangerous secondary headaches including the thunderclap emergency.
Thunderclap = 911
14 min read
Fever
Temperature thresholds in °F and °C, causes table, age-by-age guide for children, vulnerable adults, home care evidence table, and fever of unknown origin.
Above 104°F: seek care
11 min read
Coming Soon
More symptom guides in development
Shortness of Breath
Cardiac, pulmonary, and other causes — coming soon.
Nausea & Vomiting
Causes, red flags, and home management — coming soon.
Dizziness & Vertigo
BPPV, vestibular causes, and cardiac causes — coming soon.
Leg Pain & Swelling
DVT, peripheral artery disease, and other causes — coming soon.