痕 - mark, foot print

trace; vestige; mark; sign; evidence

bloodstain

creating patterns in human flesh through scarification

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

fingernail mark; scratch

trace fossil

trace fossil

smallpox

stria (carved out by a glacier, etc.)

shoe print (of a suspect at a crime scene); footprint

scar tissue

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