A sexually transmitted infection (STI) is a sickness that can happen to you when you have intimate contact with someone who already has the infection. This could happen when you have sex (like vaginal, oral, or anal) or when your skin comes in contact with someone else's fluids or skin that has the infection. Examples of STIs include chlamydia and herpes.
When someone has an STI, they can pass it along to other people, even if they don't have any symptoms or signs of being sick. That's why it's important to always use protection, like condoms or dental dams, when you have sex. These help reduce the risk of getting an STI.
If you think you might have an STI, it's important to go to a doctor or nurse. They can examine you and give you medicine to treat the infection. They can also give you advice on how to prevent getting an STI in the future. Remember, it’s always better to be safe than sorry when it comes to your health!