Written Laser Hair Removal Practice Exam 2025 – All-in-One Guide to Master Your Certification!

The correct answer is bacterial or fungal infection, as these are the primary causes of folliculitis. This condition occurs when hair follicles become inflamed, typically due to an infection. Bacteria, particularly Staphylococcus aureus, are common culprits, as they naturally reside on the skin and can enter the follicle through micro-abrasions or other disruptions. Fungal infections, such as those caused by yeast, can also lead to folliculitis, especially in warmer, humid conditions where such organisms thrive.

While viral infections can lead to other skin issues, they are not the primary reason for folliculitis. Allergic reactions, on the other hand, may cause irritation or dermatitis around the follicle but do not directly result in the inflammation of the follicles that characterizes folliculitis. Similarly, physical injury can damage the skin and hair follicles but does not inherently lead to the infection that would manifest as folliculitis. Thus, the most accurate cause of this specific condition links back to bacteria and fungi.