What Is Mucosal Erythema?

What Is Mucosal Erythema? Erythematous means redness. So, having erythematous mucosa means the inner lining of your digestive tract is red. Erythematous mucosa isn’t a disease. It’s a sign that an underlying condition or irritation has caused inflammation, which has increased blood flow to the mucosa and made it red. What is erythema in the