It is generally recommended to limit or avoid caffeine and alcohol intake after hernia surgery. Caffeine and alcohol can have a diuretic effect, which can increase the risk of dehydration. Dehydration can hinder the healing process and potentially cause complications. It is best to opt for hydrating beverages, such as water or herbal tea, during your recovery period. However, it is important to consult with your healthcare provider or a registered dietitian for personalized recommendations based on your specific condition.