Danemia, also known as lower extremity lymphangitis, is typically characterized by swelling and pain in the lower extremities. In the acute phase of swollen feet caused by dermatitis, the affected limb should be elevated to promote venous blood return. In addition, a wet application of magnesium sulfate on the surface of the lesion or wound, especially the red and swollen area, has a local astringent effect. It also needs to be combined with intravenous anti-infection treatment, as it is commonly caused by streptococci, so a broad-spectrum penicillin sodium can be chosen for intravenous input. During the treatment period, it should be combined with general treatment, mainly by eating more light food and easily digestible food, and it must be noted that no smoking, no drinking, no weight bearing and no excessive activity. During the treatment period, we should pay attention to the changes of local blood circulation, and also change the medication if there is a significant rupture.