A month of recurrent headaches, worse today after heat and sun exposure, most often comes from a mix of heat, dehydration, poor sleep, and muscle tension, layered on existing hypertension. Heaviness that increases lying flat and eases on sitting can happen with sinus congestion or tension-type headaches. Your BP and pulse today are both in a normal range, which is reassuring.
Next Steps
Stay well hydrated, avoid direct sun during peak hours, and keep taking your blood pressure medicine as prescribed. Track your BP a few more times this week and share the readings with your physician.
Health Tips
See a doctor soon if the heaviness keeps worsening, or if you develop vomiting, blurred vision, or weakness.