Hooked larvae dermatitis, commonly known as “fecal touch” and “fecal poisoning”, is an inflammation of the skin caused by hooked larvae, which can last for 3 to 5 days. When the larvae invade the skin, there is an itchy local rash and protruding papules or small herpes. Secondary infections can be caused by scratching, and local lymph nodes can be enlarged. The blood is low in hemoglobin and small cell anemia, the total number of red blood cells is reduced, the morphology and size of red blood cells vary, the coloring becomes lighter, the central colorless transparent area is enlarged, and a few heterogeneous red blood cells and multicolored or basophilic dot-colored cells can be found. The amount of hemoglobin and average hemoglobin concentration decreased earlier. Total leukocytes and eosinophils increase at the beginning of the disease and decrease later due to severe anemia. The extracellular iron in the bone marrow disappears, the percentage of iron-granulocytes is mostly low, the serum iron concentration is significantly reduced, usually below 9 μmol/L, the total plasma iron binding capacity is increased, and the free protoporphyrin in the red blood cells is increased. The bone marrow erythrocyte system showed hyperplastic signs. Eosinophilia can also be seen in peripheral blood and bone marrow. In severe cases, plasma serum protein and serum iron levels are significantly reduced. 2. Laboratory examination of stool: detection of hooked larvae eggs or hatching of hooked larvae is the basis for confirmation of the diagnosis. Anemia of varying degrees (microcytic hypochromic type), increased eosinophils, and significant decrease in plasma albumin and serum iron levels in the later stages of the disease. Other tests such as intradermal tests and immunological aspects are useful for diagnosis, but are not specific.