What is the primary cause of increased lymphatic obstruction?

Increased lymphatic obstruction is primarily associated with infections, particularly those that lead to the impairment of lymphatic drainage. Infections, especially those caused by certain parasitic organisms such as filarial worms, can result in conditions like lymphatic filariasis, which significantly impede lymphatic flow. Bacterial infections, including cellulitis, can cause localized inflammation and swelling, which further obstructs lymphatic vessels.

Trauma can also contribute to lymphatic obstruction, particularly if lymphatic vessels are damaged, but infections tend to be more common causative agents due to their widespread prevalence and the resulting inflammatory response. Cardiovascular disease, while it may affect fluid dynamics and edema, isn't a direct cause of lymphatic obstruction itself. Allergic reactions typically result in localized swelling due to an increase in vascular permeability rather than a direct obstruction of lymphatic pathways. Overall, infections stand out as the primary cause due to their direct impact on lymphatic function and integrity.