There are certain pains that nothing can alleviate, nor heal, and there are wounds that nothing can cicatrize.
The wound is beginning to cicatrize, and generates laudable pus.
Humility is also a healing virtue; it will cicatrize a thousand wounds, which pride would keep for ever open.
cicatrize cic·a·trize (sĭk'ə-trīz')
v. cic·a·trized, cic·a·triz·ing, cic·a·triz·es
To heal by forming scar tissue.