Which of the following conditions requires extra caution during nail services?

Psoriasis is a chronic skin condition that can significantly affect the nail matrix and result in a variety of nail issues, including pitting, discoloration, and abnormal nail growth. During nail services, it's crucial to exercise extra caution when working with clients who have psoriasis, as they may experience sensitivity and irritation. The presence of psoriasis may also indicate inflammation, which could be exacerbated by certain nail treatments or products. Therefore, being aware of this condition and handling it with care ensures not only the client's comfort but also minimizes the risk of further nail damage or complications.

In contrast, while dry nails and weak nail beds might also require some consideration, they do not pose the same level of concern as psoriasis in terms of skin and nail inflammation. Healthy cuticles, on the other hand, typically do not require extra caution during services, as they are in a normal condition conducive to nail care.