The invention features therapeutic compounds useful for the treatment of skin diseases (e.g., psoriasis and eczema), infections (microbial, viral, and fungal), and wounds (e.g., cuts and burns). The compounds of the invention include therapeutically-effective amounts of L-Arginine, undecylenic acid, and Rheum Officinale extract. The invention further provides for the administration of the therapeutic compounds to a patient (e.g., a human) suffering from a skin disease, infection, or wound.