The causes of itchy skin with yellow water include eczema, folliculitis, acne, herpes and so on. 1. Eczema: in case of eczema, due to various factors leading to inflammatory reaction of the skin, at this time the exudation of blood vessels increases, leading to an increase in tissue fluid, which leads to the phenomenon of yellow water. 2. Folliculitis: In case of folliculitis, due to the infection of Staphylococcus aureus, yellow pus will appear, and the phenomenon of itchy skin with yellow water will also occur. 3. Acne: In case of acne, due to the infection of Propionibacterium acnes, inflammation of the skin can be triggered, and the inflammation will increase the exudation, which will result in the oozing of yellow water. 4. Herpes: In the case of herpes virus infections, these viruses can damage the skin, resulting in the production of blisters, which can also cause itchy skin with yellow water. Finally, please go to the hospital in time for examination if you have itchy skin with yellow water.