Final answer:
Acne is the skin type/condition that would be contraindicated to the use of hot oil masks.
Step-by-step explanation:
The skin type/condition that would be contraindicated to the use of hot oil masks is acne. Acne is a skin disorder characterized by the clogging of pores, leading to infection and inflammation. Using hot oil masks can further exacerbate the condition by adding excess oil to the skin and potentially worsening the clogged pores and inflammation. It is important to avoid using any products or treatments that can irritate acne-prone skin, and hot oil masks fall into that category.