and can rapidly spread in the early hours before blood clotting eventually stems the bleeding. The main symptom of a subconjunctival hemorrhage is a bright red patch in the eye that may spread and ...

the protein in your red blood cells that carries oxygen throughout your body. When hemoglobin binds with oxygen, it turns bright red. When it drops off that oxygen to your tissues and organs ...

The color of a person’s period blood can indicate different health conditions. For example, a bright red period indicates a healthy flow, while darker red or dark brown can signify pregnancy.