Ibn 'Umar may Allah be pleased with them narrated:
The Prophet [PBUH] cursed the woman who joins false hair to her real hair [extensions) and the one who asks for it to be done to her; and the woman who tattoos (others) and the one who has it done (for her).
[Al-Bukhari & Muslim, Bulugh Al-Maram, the Book of Marriage, Ch.2, Hadeeth No.876].
Are you not satisfied with the way Allah created you? Why are you not comfortable in your skin? Fashion today, has turn a lot people into slaves without them noticing. Slaves of Dunya. Some Muslims have copied everything including the bad and evil from the fashion industry. Our women wear wigs on their wedding day. And we fix it on innocent young sisters and daughters. Some of them sell wigs and own hair salons for fixing wigs on people. Nowadays the use of artificial hair is very common among the women for beautification.
And both men and women tattoo themselves. It's become the trend among Muslims now. It's forbidden for Muslims tattoo themselves.
In the above Hadeeth, four types of women have been cursed: Those who use extensions to make their hair look long and those who are involved in this business. Those who tattoo their bodies and those who are tattoo designers. These four types have been cursed.
It is Makrooh Tanzeehi (disliked) to perform Salah with the eyes closed unless it is done to protect oneself from distraction.