The Prophet ﷺ said: If anyone has himself cupped on the 17th, 19th and 21st it will be a remedy for every disease.  

قَالَ رَسُولُ اللَّهِ ﷺ مَنِ احْتَجَمَ لِسَبْعَ عَشْرَةَ وَتِسْعَ عَشْرَةَ وَإِحْدَى وَعِشْرِينَ كَانَ شِفَاءً مِنْ كُلِّ دَاءٍ  

(the narrator other than Musa said that Kayyisah daughter of AbuBakrah) She said that her father used to forbid his family to have themselves cupped on a Tuesday, and used to assert on the authority of the Messenger of Allah ﷺ that Tuesday is the day of blood in which there is an hour when it does not stop.  

وَقَالَ غَيْرُ مُوسَى كَيِّسَةُ بِنْتُ أَبِي بَكْرَةَ أَنَّ أَبَاهَا كَانَ يَنْهَى أَهْلَهُ عَنِ الْحِجَامَةِ يَوْمَ الثُّلاَثَاءِ وَيَزْعُمُ عَنْ رَسُولِ اللَّهِ ﷺ أَنَّ يَوْمَ الثُّلاَثَاءِ يَوْمُ الدَّمِ وَفِيهِ سَاعَةٌ لاَ يَرْقَأُ  

The Messenger of Allah ﷺ had himself cupped above the thigh for a contusion from which he suffered.  

أَنَّ النَّبِيَّ ﷺ احْتَجَمَ عَلَى وَرِكِهِ مِنْ وَثْءٍ كَانَ بِهِ