MCAS Tracker

Track mast cell reactions, histamine triggers, H1/H2 blockers, flare logs.

MCAS Tracker is a private mast cell activation syndrome diary for the condition where your immune system turns everyday life into a minefield. Log reactions as they cascade, map your personal trigger web, track every H1 blocker, H2 blocker, and mast cell stabilizer, then hand your immunologist a reaction timeline that makes the invisible visible.

Built for adults managing MCAS, histamine intolerance, mastocytosis, idiopathic anaphylaxis, and the crossover with EDS, POTS, and ME/CFS.

🚨 REACTION LOGGING
Capture mast cell reactions the way they hit:
• Severity on a 1-to-10 anaphylaxis-adjacent scale
• Flushing, hives, and angioedema
• GI distress: nausea, cramping, diarrhea, bloating
• Tachycardia, hypotension, and presyncope
• Brain fog and cognitive dysfunction
• Throat tightness and breathing difficulty
• Bone pain, joint pain, and muscle aches
• Post-reaction crash duration
• Anaphylaxis episodes and epinephrine auto-injector use
• Custom symptoms unique to your presentation

🔍 TRIGGER IDENTIFICATION
Map the trigger web unique to your mast cells:
• Foods ranked by histamine content and tolerance
• Heat, cold, sun, pressure, vibration
• Fragrances, cleaning products, smoke
• Medications that destabilize mast cells
• Stress, hormonal cycle, exercise intensity
• Mold, VOCs, and environmental toxins
• Sleep deprivation as cumulative trigger
• Custom triggers you discover over time

💊 MEDICATION TRACKING
Track your full stabilization protocol:
• H1 antihistamines: cetirizine, fexofenadine, ketotifen
• H2 blockers: famotidine
• Mast cell stabilizers: cromolyn sodium, quercetin
• Leukotriene inhibitors: montelukast
• DAO enzyme supplementation
• Epinephrine auto-injector use logging
• Emergency action plan quick access
• Dose changes, side effects, refill reminders

🥗 LOW-HISTAMINE DIET AND FOOD DIARY
• Meal logging with histamine level estimates
• Food freshness and preparation method
• Reaction timing relative to meals
• Elimination diet phase tracking
• Safe food list building
• DAO enzyme timing relative to meals

🧪 LAB AND BIOMARKER TRACKING
• Serum tryptase levels
• Plasma and urine histamine
• 24-hour urine prostaglandin D2
• N-methylhistamine and chromogranin A
• Trend graphs across months

🌡️ ENVIRONMENTAL LOGGING
• Sleep quality and duration
• Temperature, humidity, barometric pressure
• Exercise load and pacing
• Stress and hydration
• Hormonal cycle phase

📊 INSIGHTS AND REPORTS
• Reaction frequency, severity, and duration trends
• Trigger correlations with statistical weight
• Medication response curves
• Food diary and reaction timing correlation
• Seasonal and weather-linked patterns
• PDF and CSV exports for specialists

🧭 EDS/POTS COMORBIDITY CROSSOVER
• Joint hypermobility logging alongside flares
• Heart rate and orthostatic vitals
• Shared trigger overlap analysis

⚡ BUILT FOR REACTIVE DAYS
• 30-second quick logging during a reaction
• Voice-to-text when you cannot type
• Calm, low-stimulation interface
• Health Connect sync for heart rate, steps, sleep
• Passcode and biometric lock
• Offline-first with encrypted cloud backup

MCAS is not allergies. MCAS Tracker treats it like the systemic mast cell disorder it is, helping you find your threshold, build a safe baseline, and give your specialist reaction-by-reaction data that tryptase draws alone cannot show.

Disclaimer: MCAS Tracker is for informational and personal tracking use only. It is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional for medical concerns.