Are there any particular psychological or health related problems caused by peer pressure?

Many. Peer pressure, like any other psychological stress, can make a person uncomfortable, irritable, or distracted. Health problems can result if this pressure leads the person to act in unhealthy or risky ways. Common problems include smoking, irresponsible sex, unsafe driving, drug use, etc. Although resisting peer pressure can be hard, it's often the smartest & healthiest choice.