What condition should you NOT work on when providing cosmetic services?

Tinea, commonly known as a fungal infection, is a condition that should not be treated with cosmetic services as it can be contagious and poses a risk of spreading to both the client and the cosmetologist. Conditions like psoriasis, eczema, and acne are typically chronic skin issues that many cosmetologists encounter and can often be worked on with proper precautions and care, depending on the severity and current state of the client's skin. However, tinea's infectious nature requires careful consideration, and it is crucial to avoid providing cosmetic treatments in any area affected by this fungus to maintain health and safety standards within the salon environment. This ensures not only the well-being of the client but also that of other customers and staff.