"I have difficulty urinating. I feel a burning sensation around the area where I urinate. I am an 18-year-old woman."

It sounds like you may have a urinary tract infection. If you've had one before and received treatment within the last year, your pharmacist may be able to prescribe the same treatment again in certain circumstances. However, if this is not the case, it's important to see a doctor to get antibiotics. In the meantime, make sure to drink plenty of water and you can take acetaminophen or ibuprofen to help with any discomfort you may be feeling. If you have any more questions, feel free to ask.