The Lawfulness of Wearing Silk if One is Suffering from an Itch

Anas (May Allah be pleased with him) reported:
Messenger of Allah ﷺ permitted Zubair and `Abdur-Rahman bin `Auf (May Allah be pleased with them) to wear silk because they were suffering from an itch.

[Al-Bukhari and Muslim].

عن أنس رضى الله عنه قال: رخص رسول الله ، ﷺ، للزبير وعبد الرحمن بن عوف رضى الله عنهما في لبس الحرير لحكة بهما. .