Waking up feeling congested can be frustrating, especially when you're unsure what's causing it. Nasal congestion in the morning is often linked to allergies, sinus issues, dry air, or even sleeping position. Environmental factors like dust mites, pet dander, and mold can trigger overnight inflammation, while conditions such as acid reflux or dehydration may also play a role. Understanding the root causes of morning congestion can also help you find effective solutions for ...