What is a potential consequence of lymphatic obstruction during diving?

Lymphatic obstruction during diving can indeed lead to localized pain in the involved lymph nodes. The lymphatic system plays a critical role in fluid balance and the immune response by draining fluid from tissues and filtering it through lymph nodes. When this system is obstructed, it can result in the accumulation of lymph fluid (lymphedema), which can cause swelling and pressure on nearby tissues, including the lymph nodes themselves. This pressure can lead to localized pain or discomfort, particularly in the area where the obstruction occurs.

In contrast, the other options do not align with the physiological effects of lymphatic obstruction. For example, increased oxygen absorption is not a direct outcome of lymphatic issues; rather, it relates to respiratory physiology and the function of the lungs and circulatory system. Similarly, localized pain is not typically associated with improved tissue drainage or rapid recovery of swelling; instead, obstruction tends to hinder drainage and can prolong swelling. Therefore, the answer emphasizes the direct consequence of lymphatic blockade and the resulting symptoms, reinforcing the impact of the lymphatic system's functionality during diving activities.