The ruling on shaving the head: is it permissible in all cases?

Question:
He says: Honorable Shaykh, may Allah grant you success, is shaving the head permissible in all cases, or is there a distinction among the scholars?

Answer:
I do not recall there being a distinction in this matter. It is among the permissible things. If you wish, you may shave it, and if you wish, you may let it grow, but in accordance with the lawful manner reported from the Messenger of Allah (peace and blessings be upon him). For this reason, Imam Ahmad (may Allah have mercy on him) said that growing the hair is a recommended practice (sunnah) if we were able to do so. If we were able to do so, we would grow it, but it involves a burden. This is the meaning of Imam Ahmad’s (may Allah have mercy on him) statement.
The person who wants to let his hair grow in the lawful manner reported from the Messenger of Allah (peace and blessings be upon him) and is patient with that, that is good. As for the one who says, "By Allah, I am not patient, and we have no time for it," he may shave it. Praise be to Allah. Yes.