While it is certainly true that it is illegal to buy or sell marijuana, you can still get a license that will allow you to buy your own for medical use. Of course, if you want to get this license you will need to visit a doctor, and your doctor will have to find out if you have a condition that is supposed to be treated with medical marijuana or not. If it turns out that you do, then you will likely receive a prescription and can move on to applying for a license.
If everything goes according to plan, within a very short amount of time you will be given your very own medical marijuana license and from here on you will be able to purchase your own medical marijuana. There are so many different health benefits that could be yours if you chose to continue with the application process and get yourself a license, so it really is well worth the effort that you will need into applying for a license correctly. A good way to start things off would be to spend some time doing online research to find out exactly what steps you must take to get a medical marijuana license for yourself.