And sometimes, fluid around the heart occurs for no reason that we can determine, which is known as idiopathic pericarditis. In fact, the most common cause of pericarditis is an idiopathic (or presumed) viral infection, which usually will go away on its own over time or with anti-inflammatory medications.
Lymph nodes become swollen in response to illness, infection, or stress. Swollen lymph nodes are one sign that your lymphatic system is working to rid your body of the responsible agents. Swollen lymph glands in the head and neck are normally caused by illnesses such as: ear infection.
Lymph nodes are located in groups, and each group drains a specific area of your body. You may be more likely to notice swelling in certain areas, such as in the lymph nodes in your neck, under your chin, in your armpits and in your groin.The site of the swollen lymph nodes may help identify the underlying cause.ymph nodes are located in groups, and each group drains a specific area of your body. You may be more likely to notice swelling in certain areas, such as in the lymph nodes in your neck, under your chin, in your armpits and in your groin. The site of the swollen lymph nodes may help identify the underlying cause.