👉 Lymphangiitis is a type of inflammation that occurs in the blood vessels, specifically within the lymphatic system. It is characterized by the presence of swollen, inflamed blood vessels, which can lead to pain and swelling around the heart, lungs, or brain. The cause of lymphangiitis is not fully understood but it is thought to be caused by an immune reaction against certain pathogens such as bacteria or viruses. Treatment options for lymphangiitis may include antibiotics, immunosuppressants,