Ruling on cauterizing, and reconciling ahaadeeth on this topic which appear to contradict one another

Many ahaadeeth have been narrated on the topic of
cauterizing, which the scholars divided into four categories. 

1 – Those which indicate
that it is permissible, such as the hadeeth of Jaabir who said: Ubayy was
struck by an arrow in his medial arm vein on the day of al-Ahzaab, and the
Messenger of Allaah (peace and blessings of Allaah be upon him)
cauterized it. Narrated by Muslim, 2207. 

2 – Those which indicate that he did not like it, such as the
hadeeth of Jaabir (may Allaah be pleased with him) who said: I heard the
Prophet (peace and blessings of Allaah be upon him) say: “If there is
anything good in your medicine it is in the instrument of the cupper or
drinking honey or cauterizing with fire that suits the ailment, but I would
not like to be cauterized.” Narrated by al-Bukhaari, 5683; Muslim, 2205. 

3 – Those which praise those who do not do that, such as the
hadeeth of ‘Imraan ibn Husayn concerning the seventy thousand who will enter
Paradise without being brought to account: “… those who did not use
cauterization.” Narrated by al-Bukhaari, 6541, and Muslim, 218. 

In the hadeeth of ‘Imraan ibn Husayn (may Allaah be pleased
with him) it says that the angels would greet him because he did not use
cauterization. When he used it, they stopped greeting him, then when he
stopped using it, they started to greet him again. Narrated by Muslim,
1226. 

4 – Those which indicate that cauterization is makrooh, such
as the hadeeth of Ibn ‘Abbaas (may Allaah have mercy on him) who said that
the Prophet (peace and blessings of Allaah be upon him) said: “Healing
is to be found in three things: the instrument of the cupper, drinking honey
and cauterization with fire, but I forbid my ummah to use cauterization.”
Narrated by al-Bukhaari, 5681. 

This is how the reports may be reconciled. Forbidding here
means that it is makrooh, and the ahaadeeth which say that he did it
indicate that it is permissible when there is a need for it. 

Ibn ‘Abd al-Barr said: I do not know of any scholarly
difference of opinion, for they did not see anything wrong with
cauterization if there was a need for it. 

The reason why it is makrooh is because it
causes suffering and pain.