Health Assessment Tool

Understand Your Symptoms & Know When to Seek Care

A free, evidence-based symptom checker to help you understand what your symptoms might mean, identify warning signs that need immediate attention, and decide when to see a healthcare provider.

Symptom Checker— evidence-based information
MD

I can help you understand your symptoms and decide on appropriate next steps. Describe what you're experiencing, including when it started and how severe it is. I'll provide general information — always consult a healthcare provider for diagnosis.

I have a headache that won't go away When should I go to the ER? Is my fever serious?
This tool provides general health information, not medical advice. For emergencies, call 911. Always consult a healthcare provider for diagnosis and treatment.
200+
Common symptoms covered
Mayo Clinic reference
72%
Of ER visits could be handled elsewhere
UnitedHealth Group, 2019
3 days
Average time people wait before seeking care
JAMA Internal Medicine
85%
Of diagnoses come from patient history
BMJ, 2016

🚨 Call 911 or Go to the ER Immediately For:

How to Use This Symptom Checker

Our symptom checker helps you understand potential causes of your symptoms and decide whether you need immediate care, a doctor's appointment, or can safely try self-care at home. Here's how to get the most accurate information:

1. Be specific: Describe exactly what you're feeling — is the pain sharp, dull, burning, or throbbing? Where exactly is it located?

2. Include timing: When did it start? Is it constant or does it come and go? What time of day is it worst?

3. Note severity: Rate your symptom on a 1-10 scale. Is it interfering with daily activities?

4. Mention context: Any recent injuries, illnesses, new medications, or life changes? Have you had this before?

Common Symptoms by Area

Symptoms often relate to specific body systems. Select a category to learn about common symptoms, their possible causes, and when to seek care.

When to Seek Different Levels of Care

Care Level Timeframe Examples
🚨 Emergency (911/ER) Immediately Chest pain, stroke symptoms, severe bleeding, difficulty breathing, loss of consciousness
⚠️ Urgent Care Same day High fever, moderate injuries, UTI symptoms, ear pain, persistent vomiting
📅 Doctor Appointment Within 1-2 weeks Ongoing symptoms, medication questions, new rash without fever, chronic condition management
🏠 Self-Care at Home Monitor 24-72 hours Mild cold symptoms, minor headache, mild muscle soreness, minor cuts/bruises

When in doubt, err on the side of caution. A telehealth visit can help determine if you need in-person care.

Symptoms That Always Need Medical Attention

Certain symptoms — regardless of how you feel otherwise — warrant prompt medical evaluation. These "red flag" symptoms may indicate serious conditions that benefit from early treatment:

What to Do While Monitoring Symptoms

For mild symptoms that don't require immediate medical attention, these general self-care strategies can help while you monitor your condition:

💡 The RICE Method for Injuries

Rest the injured area. Ice for 20 minutes every 2-3 hours. Compress with elastic bandage. Elevate above heart level when possible. Effective for sprains, strains, and minor injuries in the first 48-72 hours.

Stay hydrated: Drink plenty of water, especially with fever, vomiting, or diarrhea. Clear broths and electrolyte drinks can help replace lost minerals.

Rest appropriately: Your body heals during rest. Don't push through significant symptoms — it often prolongs recovery.

Track your symptoms: Note timing, severity, and what makes symptoms better or worse. This information is valuable if you do need to see a doctor.

Use OTC medications wisely: Follow package directions. Acetaminophen for fever/pain, ibuprofen for inflammation, antihistamines for allergies. Don't exceed recommended doses.

Limitations of Symptom Checkers

While symptom checkers are useful educational tools, they have important limitations you should understand:

Bottom line: Use this tool to become a better-informed patient, not to avoid medical care when you need it. Trust your instincts — if something feels seriously wrong, seek professional evaluation.

Last reviewed: February 2026 by thrive.md Clinical Advisory Team