Name a skin condition that may require a medical referral before treatment.

Psoriasis is a chronic autoimmune skin condition characterized by the rapid proliferation of skin cells, leading to the formation of scales and red patches that can be itchy and sometimes painful. This condition is complex and often requires medical intervention or management through a dermatologist. Treatments may include the use of topical corticosteroids, systemic medications, or phototherapy, which are beyond the scope of typical esthetician practice.

For estheticians, it is crucial to recognize when a condition may necessitate medical referral to ensure the client receives appropriate care and to prevent exacerbating the condition. While conditions like dry skin, acne, and sensitive skin may also require some level of caution or specialized treatment, they are usually manageable within the esthetician's scope of practice, especially with topical products and basic skin care techniques. Therefore, psoriasis stands out as a condition that definitely warrants a medical referral before proceeding with treatment.