Yellow or green discoloration under a nail enhancement is typically caused by what?

Yellow or green discoloration under a nail enhancement is typically caused by bacteria. When moisture becomes trapped under the enhancement, it creates an environment conducive to bacterial growth. Bacteria can thrive in such conditions, leading to infection, which manifests as discoloration in the nails.

This discoloration generally indicates a lack of proper nail care, such as inadequate drying of nails or enhancements, allowing bacteria to proliferate and produce pigmented byproducts. Recognizing this is critical for nail technicians, as it emphasizes the importance of maintaining cleanliness, ensuring proper application techniques, and following hygiene protocols to prevent such issues from arising in clients.