Pseudotuberculous nodules are lesions caused by eggs in schistosomiasis. Acute egg nodules are an acute necrotic, exudative lesion caused by mature eggs. After 10 days of acute egg nodules, the capillaries in the eggs die, the eggs and necrotic material are removed, absorbed or calcified, and the macrophages in the lesion are diffused into epithelial-like cells and foreign multinucleated giant cells, forming granulomas similar to tuberculosis nodules, called pseudotuberculosis nodules, or chronic worm egg nodules. To prevent pseudotuberculous nodules, one must first prevent schistosomiasis. People must do the following to prevent the re-occurrence of schistosomiasis. 1, do not touch the water source with schistosomiasis. 2, actively treat patients, sick animals, reduce the source of infection. 3.Eliminate the nail snail. 4, good control of water sources, do not drink raw water. As long as you do the above points, you can prevent schistosomiasis.