L80-L99: Other disorders of the skin and subcutaneous tissue

L93: Lupus erythematosus

Lupus erythematosus is a group of autoimmune diseases, which means the body's own immune system mistakenly attacks healthy tissue. This causes inflammation, swelling, and damage to various parts of the body. There are several forms of lupus, but the most common one affects the skin and internal organs, creating a wide range of symptoms. These can include fatigue, joint pain, skin rashes, and fever. The precise cause of lupus is unknown, but it can be influenced by factors such as genetics, environment, and hormones. Disease progression varies greatly: some people may have mild symptoms only a few times, while others may have severe, persistent symptoms. Lupus can affect multiple systems in the body, including the skin, joints, and internal organs like the heart and kidneys.