(1) The aforementioned narration has been declared weak in its chain of transmission by the researcher of the book, whereas other scholars have considered it to be sahih li ghayrihi (authentic due to supporting narrations), and the preferred opinion is theirs. See: (al-Mawsu‘ah al-Hadithiyyah, Musnad al-Imam Ahmad: 23/182). Therefore, in case of necessity, cupping (hijamah) may be performed. This is also established by other authentic narrations.
(2) “Moch” refers to a situation where the bone is not harmed, but there is pain in the flesh and muscles, or the bone is struck but is spared from breaking. The discussion regarding the permissibility of cupping and related matters has already passed above under Hadith: 2848.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 2851