You can do some types of tests at home, such as testing for blood sugar, pregnancy, urinary tract infections, and HIV infection. Some home tests give you results right away, such as a pregnancy test. Others provide a way for you to send a sample to a lab for testing. The lab then reports results back to you.
The quality and reliability of home tests vary greatly. Ask your doctor or pharmacist to recommend a reliable brand. Follow the instructions, and check with your doctor if you are concerned about the results. Your doctor will usually do further testing to confirm your results.