I say, with Allah's guidance: A wound that is always bleeding and does not have the strength to flow, but if left, it strengthens by accumulating and flows from its place. If it is dried or wrapped with a cloth and every time something comes out, the cloth absorbs it, then consider: if what the cloth absorbs in that session accumulates little by little such that if left, it would flow by itself, it breaks the ablution. Otherwise, it does not. Do not combine what is in one session with another session, and this provides great ease for those with sores. Refer to: Radd al-Muhtar 1: 135. And Allah knows best.