痕 - mark, foot print

bloodstain

trace; vestige; mark; sign; evidence

scar (e.g. from operation, injection); trace; mark (e.g. skid marks)

ink marks; handwriting

bullet hole; bullet mark

sword scar

linear mark; abrasion; scratch; streak

impact mark

feeding signs (of an animal, e.g. teeth marks in nuts, holes in leaves)

ripple mark

fingernail mark; scratch

vestige; scar