In Hinduism, there are many symbolical things which make easy to recognize our culture, like Sikha. It is a name of Hindu / Indian origin, it also means long tuft, or a lock of hair, left on top or on the back of the shaven head of a male Hindu. Though traditionally all Hindus were required to wear a Sikha, today it is seen mainly among Brahmin and temple Pandits. Whenever we see someone who has Sikha, it’s quite obvious to know the role. But the purpose of following this tradition is pretty religious, as well as it has a scientific aspect too.
Traditionally, Hindu men shave off all their hair as a child in a Samskar or ritual known as the Chudakaram. A lock of hair is left at the crown. The Sikha reportedly conveys one-pointed (ekanta) concentrates on a spiritual objective and devotion to God. It is also an indication of cleanliness, as well as a particular surrender to God. Who keeps SIKHA attracts cosmic energy which imparts enlightenment. The little part of the hair that hangs from behind our head pertains to give slight pressure on our brain that helps one to enhance concentration and mind control and improve memory.
The Sikha is like a tying goal, the pressure of it on the brain will always remind the person about his main objective as it increases the focus. It is more of a pride in our religion, In Hindu scripture, Draupadi took an oath in the assembly of the Kurus after she was molested by Dushasan that she would remain with disheveled hair until the enemies were properly revenged.
Similarly, Chanakya is said to have taken an oath to leave his Sikha untied until he humbles the Nanda kings who insulted him. Especially those who have taken vows of not letting the power of their practices seep down into lower centers. They accumulate it and try to conduct their lives from higher centers only. They let it loose when they absolutely need to. Having a Sikha is more like pride in Hinduism.