Sexual Harassment can be very minor but also may be very serious. It may have a very destructive impact on the victim. Sexual Harassment can be by touching, text, making remarks, sending suggestive images by post, email or phone. It can involve blackmail – asking/demanding sexual favours. It can be difficult to prove as often it will be carried out away from witnesses with just the victim being present.
It can lead to many symptoms similar to those experienced by a rape victim.
There should be work place/education regulations on sexual harassment by other staff, however, if this involves a more senior colleague it may be extremely difficult to make a complaint, without risking your job/career/education.