The Prophet ﷺ has cursed the lady who lengthens her hair artificially and the one who gets her hair lengthened, and also the lady who tattoos (herself or others) and the one who gets herself tattooed.  

لَعَنَ النَّبِيُّ ﷺ الْوَاصِلَةَ وَالْمُسْتَوْصِلَةَ وَالْوَاشِمَةَ وَالْمُسْتَوْشِمَةَ  

A woman asked the Prophet ﷺ saying, "0 Messenger of Allah ﷺ! My daughter got measles and her hair fell out. Now that I got her married, may I let her use false hair?" He said (to her), "Allah has cursed the lady who lengthens hair artificially and the one who gets her hair lengthened artificially."  

سَأَلَتِ امْرَأَةٌ النَّبِيَّ ﷺ فَقَالَتْ يَا رَسُولَ اللَّهِ إِنَّ ابْنَتِي أَصَابَتْهَا الْحَصْبَةُ فَامَّرَقَ شَعَرُهَا وَإِنِّي زَوَّجْتُهَا أَفَأَصِلُ فِيهِ فَقَالَ لَعَنَ اللَّهُ الْوَاصِلَةَ وَالْمَوْصُولَةَ  

I heard the Prophet ﷺ saying, (or the Prophet ﷺ said), "Allah has cursed the lady who practices tattooing and that who gets it done for herself, and also the lady who lengthens hair artificially and that who gets her hair lengthened artificially." The Prophet ﷺ has cursed such ladies.  

سَمِعْتُ النَّبِيَّ ﷺ أَوْ قَالَ النَّبِيُّ ﷺ الْوَاشِمَةُ وَالْمُوتَشِمَةُ وَالْوَاصِلَةُ وَالْمُسْتَوْصِلَةُ يَعْنِي لَعَنَ النَّبِيُّ ﷺ  

Allah has cursed those women who practise tattooing or get it done for themselves, and those who remove hair from their faces, and those who create spaces between their teeth artificially to look beautiful, such ladies as change the features created by Allah. Why then shall I not curse those whom Messenger of Allah ﷺ has cursed and who are cursed in Allah's Book too?  

لَعَنَ اللَّهُ الْوَاشِمَاتِ وَالْمُسْتَوْشِمَاتِ وَالْمُتَنَمِّصَاتِ وَالْمُتَفَلِّجَاتِ لِلْحُسْنِ الْمُغَيِّرَاتِ خَلْقَ اللَّهِ مَا لِي لاَ أَلْعَنُ مَنْ لَعَنَهُ رَسُولُ اللَّهِ ﷺ وَهْوَ فِي كِتَابِ اللَّهِ