The Messenger of Allah ﷺ used to have himself cupped on the top of his head and between his shoulders, and that he used to say: If anyone pours out any of his blood, he will not suffer if he applies no medical treatment for anything.  

أَنَّ النَّبِيَّ ﷺ كَانَ يَحْتَجِمُ عَلَى هَامَتِهِ وَبَيْنَ كَتِفَيْهِ وَهُوَ يَقُولُ مَنْ أَهْرَاقَ مِنْ هَذِهِ الدِّمَاءِ فَلاَ يَضُرُّهُ أَنْ لاَ يَتَدَاوَى بِشَىْءٍ لِشَىْءٍ  

[Machine] "Narrated by the Prophet of Allah ﷺ that he used to cover his forehead and the area between his shoulders and say, 'Whoever sheds this blood, it is not permissible for him to seek healing through anything.'"  

عَنْ نَبِيِّ اللهِ ﷺ أَنَّهُ كَانَ يَحْتَجِمُ عَلَى هَامَتِهِ وَبَيْنَ كَتِفَيْهِ وَيَقُولُ «مَنْ أَهْرَاقَ هَذِهِ الدِّمَاءَ فَلَا يَضُرَّهُ أَنْ يَتَدَاوَى بِشَيْءٍ لِشَيْءٍ»  

The Messenger of Allah ﷺ used to have himself cupped on the top of his head and between his shoulders, and that he used to say: If anyone pours out any of his blood, he will not suffer if he applies no medical treatment for anything. (Using translation from Abū Dāʾūd 3859)   

أَنَّهُ حَدَّثَهُ أَنَّ نَبِيَّ اللهِ ﷺ كَانَ يَحْتَجِمُ عَلَى هَامَتِهِ وَبَيْنَ كَتِفَيْهِ وَيَقُولُ مَنْ أَهْرَاقَ مِنْ هَذِهِ الدِّمَاءِ فَلَا يَضُرُّهُ أَنْ لَا يَتَدَاوَى بِشَيْءٍ أَظُنُّهُ قَالَ لِشَيْءٍ  

" عَنْ عَبْدِ الرَّحْمَنِ بْنِ خَالِدِ بْنِ الْوَلِيدِ أَنَّهُ كَانَ يَحْتَجِمُ فِى هَامَتِهِ وَبَيْنَ كَتِفَيْهِ وَقَالَ: إِنَّ رَسُولَ الله ﷺ كَانَ يَحْتَجِمُهُمَا وَيَقُولُ: مَنْ أَهْرَاقَ مِنْ هَذِهِ الدِّمَاءِ فَلَا يَضُرُّهُ أَن لَا يُدَاوَى بِشَىْءٍ لِشَىْءٍ".