Also known as a splinter hemorrhage, black lines (which might surface brown or darkish crimson) appear like splinters. They will surface various times. The probably result in is usually a trauma for your nail, including accidentally slamming a door on your own finger. Dress in sandals in damp, public spots: https://spencerncru46914.celticwiki.com/1583825/5_simple_statements_about_massage_oil_explained