A symptom diary is a systematic way to record your daily health symptoms, their severity, and potential triggers. It helps you identify patterns, understand what worsens or improves your condition, and provides valuable data for your healthcare provider. Regular tracking can lead to more accurate diagnoses, better treatment plans, and improved self-awareness of your health. For people with chronic conditions, a symptom diary is an essential tool for managing day-to-day wellness.

For best results, aim to record symptoms daily, ideally at the same time each day (e.g., in the evening). Consistency is key to spotting patterns. If you experience significant changes during the day, you may want to note morning and evening symptoms separately. Even on days when you feel well, recording "no symptoms" is valuable data – it helps establish your baseline and makes it easier to identify when something changes.

Use a consistent 1–10 scale: 1–3 = Mild (noticeable but not interfering with daily activities); 4–6 = Moderate (somewhat interferes with daily life); 7–8 = Severe (significantly limits activities); 9–10 = Very Severe (debilitating, requires immediate attention). Try to be objective and consistent. Over time, you'll develop a personal baseline that makes your ratings more meaningful and comparable.

Yes, completely. All data is stored locally in your browser using localStorage. No information is ever sent to any server or third party. Your symptom records remain on your device. However, this also means data can be lost if you clear your browser data or switch devices. We recommend using the Export feature regularly to create backups. For added security, consider keeping an exported copy in a safe location.

Include context that might help identify triggers or patterns: medications taken (dosage and timing), meals and dietary changes, sleep quality and duration, stress levels, weather changes, physical activity, exposure to allergens, menstrual cycle (if applicable), and any other factors relevant to your health condition. The more context you provide, the more valuable your symptom diary becomes for identifying correlations.

Absolutely. A well-maintained symptom diary provides your healthcare provider with objective, longitudinal data that can reveal patterns invisible during a single consultation. It helps track treatment effectiveness, identify side effects, and adjust medications more precisely. Many doctors appreciate patients who bring organized symptom records to appointments. Use the Export feature to generate a summary you can share with your medical team.

A symptom checker is a diagnostic tool that suggests possible conditions based on symptoms you input at a single point in time. A symptom diary, on the other hand, tracks symptoms longitudinally over days, weeks, or months. While a symptom checker answers "What might this be?", a symptom diary answers "How has this been changing over time?" Both are valuable, but a symptom diary provides a more complete picture for chronic condition management.

• Set a daily reminder – track at the same time each day (e.g., after dinner).
• Keep it simple – even a quick record with just symptoms and severity is valuable.
• Use the streak counter – gamify your tracking and aim to maintain your streak.
• Copy yesterday's entry if symptoms are similar, then adjust as needed.
• Review weekly – looking at your frequency charts and patterns reinforces the habit.
• Export monthly – creating a backup gives you peace of mind and a sense of progress.