Mesenteric lymph nodes are essential components of the lymphatic system located in the abdominal cavity, where they help filter harmful substances and support the immune system by responding to infections in the gastrointestinal tract. Swelling of these nodes can occur due to various infections, typically viral or bacterial, even if there hasn't been a significant illness beforehand. Common infections include viral gastroenteritis, bacterial infections such as Salmonella or Yersinia enterocolitica, and even conditions like appendicitis can cause lymph node activation due to inflammation. The symptoms of swollen mesenteric lymph nodes can indeed mimic those of appendicitis, particularly with pain in the right lower abdomen, leading to confusion. However, unlike appendicitis, which typically presents with continuous pain, nausea, and often requires surgical intervention, swollen lymph nodes may cause intermittent pain aligned with infections or inflammation. In Ayurveda, swollen mesenteric lymph nodes can be viewed as a manifestation of an imbalance in digestion and the immune system. The stagnation of 'kapha' dosha can lead to lymphatic swelling, implying a need for treatments that help balance kapha and support digestion. Herbs such as trikatu (a blend of black pepper, long pepper, and ginger), turmeric (for its anti-inflammatory properties), and ginger can be particularly beneficial. Additionally, a diet rich in easily digestible foods like khichdi, fresh fruits, and cooked vegetables will support digestion, while avoiding heavy, fried, or junk foods is essential for recovery and prevention. Chronic swelling can arise from ongoing infections, autoimmune conditions, or persistent inflammation related to dietary choices and lifestyle factors. While diet plays a significant role in lymphatic health, it's vital to avoid excessive junk food and promote a wholesome diet rich in antioxidants, probiotics, and good fats, which can help bolster the immune response. As for your brother's mild post-recovery discomfort, it's possible that some inflammation persists. Regular follow-ups with imaging or symptoms tracking can help determine if the lymph nodes have returned to their normal size. Stress and poor lifestyle habits can further aggravate immune function, so incorporating stress-reduction techniques like yoga, meditation, and a balanced lifestyle can be preventive measures. The recurrence risk also exists, particularly if gastrointestinal health or immunity is compromised again. For ongoing support, consider Ayurveda's holistic approach with dietary mindfulness, herbal support, and lifestyle adjustments, as these foundational changes can lead to lasting well-being and reduce the risk of recurrences.