Morbihan disease, also known as solid facial edema, solid persistent facial edema, solid facial lymphedema, or rosacea lymphedema, is a variant of rosacea that presents as solid edema of the central and upper face. It is often accompanied by persistent erythema, and other features of rosacea may also be present. It typically presents at a late stage of disease. Some cases are idiopathic, and some are associated with acne. It is thought to result from impairment in lymphatic production and drainage, and chronic vascular dilation and inflammation. It is most commonly reported in White individuals aged 30-50 years, although it has been reported in people with darker skin types and in other age groups.

Once developed, it typically does not resolve without treatment, and facial disfigurement may occur. Patients may report visual impairment due to persistent periorbital edema, which physically obstructs the visual field.