Samira Jeimy, MD, PhD on Instagram: "If your nose runs, drips, or blocks with cold air, strong smells, weather changes, exercise, or air conditioning, but allergy testing is negative, this may be vasomotor (non-allergic) rhinitis. This isn’t IgE-mediated allergy. Rather, it’s dysregulation of the autonomic nervous system, particularly parasympathetic input to the nasal mucosa, leading to inappropriate vasodilation and glandular secretion (via trigeminal and vidian nerve pathways) Antihistamines

Kunal Sood, MD on Instagram: "After intense exercise, your blood vessels are still dilated and your body is cooling down. Jumping into a hot shower adds another wave of vasodilation, which can sometimes cause dizziness or fainting, known as hot shower syncope. 🧠 What we know: heat lowers blood pressure and can worsen post-exercise pooling ❓ What’s not proven: that hot showers after workouts are dangerous or that waiting 5–10 minutes is necessary, but worth taking precaution since there are anec