Signs of blood vitiated by the doshas and of pure blood

Blood vitiated by vata is very dark, frothy, thin and quick to flow; by pitta it is blue, very yellow or black, foul-smelling and shunned by insects, mosquitoes and flies; by kapha it is thick, slimy, flesh-like, slow to flow, cold and the colour of red-ochre water. Natural blood is red like indragopa, neither too thick nor too thin and not discoloured, and must always be protected from loss.