Under the effect of peer pressure and the desire to be accepted a person can engage in a harmful behaviour such as smoking or drug addiction (See why do people smoke).
Under the effect of peer pressure a person can lose his identity because of being forced to conform to rules that don't resonate with his personality.
A person might over spend on luxury items or brands just to get accepted by his peers or by his social group (See why do people buy branded clothes).
As a person conforms to the rules set by others he might lose the sense of his own self and might end up with low self confidence.
Under the effect of peer pressure a person can stick to the opinion of the group even if it's not right for him. For example a person might choose a career that he doesn't like just because everyone is recommending it.
When a person doesn't work on fulfilling his own important needs then he might not experience happiness. Because people who do anything to get accepted by others ignore their own needs they usually become unhappy.
Under the effect of peer pressure many people feel compelled to get married at a certain age or when they discover that all of their friends are married. This type of thinking can lead to a wrong marriage partner choice.
Peer pressure can make a person less brave. If a person always chose to stay in his comfort zone and to copy others then he might not have the chance to develop the courage needed to face life problems.
In order for a person to feel good after making a decision that he took because of peer pressure he will have to find a way to convince himself that he took the right decision. Self deception is a strategy people use to convince themselves that they did the right thing when they feel unhappy.
As a result of taking so many decisions because of peer pressure a person will end up with the habbit of following the herd no matter what he believes.
Many people keep their unwanted jobs, do what they hare and don't dare to make changes to their lives because of peer pressure.
As a result of living the life others are dictating a person who follows the herd usually ends up dissatisfied with his life.