Final answer:
Scalp manipulations should be avoided if infections, open wounds, or inflammatory conditions are present to prevent exacerbation and spread of these conditions.
Step-by-step explanation:
You should not perform scalp manipulations if infections, open wounds, or inflammatory conditions such as psoriasis or severe dandruff are present on the scalp. Engaging in scalp manipulations under these conditions can exacerbate the issue and potentially spread infection. It's important always to prioritize the health and safety of the client, ensuring that any procedures done to the scalp do not lead to further complications.