What are signs of a contra-action that may occur during a nail service?

In the context of nail services, signs of a contra-action refer to adverse reactions the client might experience during or after the treatment. Itching, swelling, and blistering are strong indicators of a potential allergic reaction or sensitivity to products used during the nail service. These symptoms often suggest that the skin has become irritated or has reacted negatively, possibly due to an ingredient in the nail products like nail polish, acrylics, or adhesives used.

Recognizing these signs is essential for the safety of clients and for the technician to take appropriate measures, such as discontinuing use of the product immediately and addressing the client's discomfort.

While issues like dryness, dullness, and cracking can certainly affect nails, they are generally regarded as signs of nail health concerns or damage rather than immediate contra-actions. Redness, puffiness, and irritation are closely related to allergic reactions but do not explicitly mention itching or blistering, which are key indicators of a significant reaction. Burning, discoloration, and stinging may also suggest a reaction, but itching and swelling are often more directly associated with the immediate physical responses seen in adverse reactions. Therefore, the first choice captures a more comprehensive set of symptoms that indicate a contra-action specifically linked to the use of nail products.