In Siddha medicine, skin diseases are believed to be caused by an imbalance of the three bodily humors (vatha, pitha, and kapha) and the accumulation of toxins in the body. The treatment approach for skin diseases in Siddha medicine involves the use of herbal medicines, mineral preparations, and specialized massage techniques to balance the bodily humors and eliminate toxins.

Herbal medicines are commonly used in Siddha medicine for skin diseases. Some commonly used herbs include neem, turmeric, and aloe vera. These herbs have anti-inflammatory, antibacterial, and antioxidant properties which can help to reduce inflammation and promote healing of the skin.