Skin problems in horses come in many forms, for example (tail and mane) eczema, mud fever, scabies, an allergic or hypersensitivity reaction, a fungal infection, warts or skin cancer. They may be accompanied by itching, red skin, bumps, swelling, bald patches, flakes or lesions. The skin is the body's largest organ and has several functions. An important function of the skin is to protect the ...