痈 Yong: Inflamed heat pain, shallow and tall, no pus easy to eliminate, pus easy to collapse, due to toxic heat excessive, blood stasis.
疽 Ju: diffuse swollen headless, the same color to the skin, the boundary is unclear, no heat less pain, no suppuration difficult to eliminate, pus is hard to collapse due to cold evil stagnation, blood stagnation.
疔 Ding: As early as millet, root deep small, shaped like a needle,top white and painful, due to invasion of evil poison,stagnation of blood
疖 Jie: superficial limitations, small and round shape, swelling and pain, easy to collapse convergence, repeated attacks, due to accumulation of heat-dampness.
