Elizabeth Martin and Robert Hine. Latest Edition (7 ed.) Fully revised and updated, the sixth edition of this dictionary provides comprehensive coverage of biology, biophysics, and biochemistry, as well as key terms from medicine and palaeontology.
For example, if someone scratches a mole until it bleeds, the resulting lesion, a crust, is now a secondary skin lesion. The most common secondary skin lesions include: 1  crust: a crust, or a scab, is created when dried blood forms over a scratched and irritated skin lesion. 2  ulcer: typically caused by a bacterial infection or physical trauma. 3  scale: patches of skin cells that build up and then fall off the skin.
Tips for Treating a Dry Blood Stain: 1  As a first option, soak in cold water overnight then move on to other options. 2  Before treating, don't leave a clean section of clothing under the stain. 3  Move it out from under the stain or when you treat the stain it could transfer to a clean area of clothing. If the blood stain is larger, lay a towel under the stained area then soak with white vinegar and let sit for 30 minutes. 2  Repeat if necessary until the stain is removed. 3  Wash as usual but don't put in the dryer until you are positive the stain is gone.