You are getting a representative sample only. You are NOT performing a deep biopsy of the nail or nail bed, but simply are sampling the nail clippings, or trimmings!
Do not proceed with this test, and do seek Medical Care if the nail is painful or infected with or without drainage. Especially if you are a high risk patient with diabetes, vascular disease. immune system issues (like HIV, genetic disorders like Lupus, Rheumatoid arthritics or other immune or viral disorders) to prevent potential infections leading to hospitalizations or death.
Do not cut skin or cut past the hyponychium (the base of the free edge of the nail) or nail bed unless the nail has lifted past it’s connection to the nail bed over time. Do not force or apply pressure to the nail plate or nail bed to obtain a sample.
Care should be taken not to injure the nail bed or cause injury or bleeding to the surrounding skin around the nail.