Calf skin yellow water is an abnormal symptom, this situation should be timely medical attention, vigilance is the manifestation of certain diseases, such as impetigo, contact dermatitis, eczema and other diseases. 1. impetigo: a common infectious skin disease, with contact infection and autologous inoculation infection characteristics, the patient’s clinical manifestations to papules (higher than the skin of the confined elevation), blisters, pustules, easy to break (can seem to flow yellow water), pus scabs mainly. 2. contact dermatitis: can show a variety of skin damage, acute stage of skin allergic inflammation manifested by skin edema, accompanied by blisters, papules vesicles, oozing and other rashes, so there can be a yellow oozing of tissue fluid. 3. Eczema: generally with repeated skin erythema, papules, papules, severe cases can appear vesicles, oozing, and accompanied by obvious itching symptoms, can be manifested as yellow water or yellow scabs. This symptom alone is not enough to diagnose the disease, do not rule out that it is caused by other factors. It is recommended that the patient consult a doctor in time to clarify the cause of the disease and give targeted treatment.