Cuteneous lymphoid hyperplasia is any skin disease characterized by isolated reddish lesions or papules. These lesions are formed by an accumulation of cells of the immune system beneath the skin. They are not dangerous, but a differential diagnosis should rule out the possibility of a more serious condition. Nevertheless, they are by far the most common causes of that particular symptom. In many cases, they will self-resolve, but can be removed by a dermatologist if they are persistent.