Wisdom Tooth, Third Molar

Now a days, it is believed that wisdom tooth are vestigial organs, they are of no use, for chewing our food remaining 2 molars are sufficient.
Third molars erupted at the age of 18 to 25, until then our jaw growth is completed, so if there is no space in an individual's jaw to accommodate this new erupting molar, the problem starts, it creates pressure on adjacent 2nd molar and causes pain and in long term it causes damage to the 2nd molar.

Thus it is almost always advised to get the third molar removed once it creates problem, or accidentally found on x ray. In western countries there is a protocol to remove all third molars in a single appointment, wether they create problem or not.

I hope it helps you a bit, rest if there is any query, do msg me.