They probably WON'T understand at first...but...you have to start somewhere to help them understand. I know if it was my daughter, I would want to know so I could help. Are they normally pretty understanding people? How do you feel they will react?
I know I didn't tell my parents until about 10 years after I dropped out of college...I was too embarrassed to tell them the real reason when I stopped after my sophomore year,,,1979......thus they thought I was just a slacker who just up and quit for no good reason....I had told them at the time that the reason was that I could not decide what to major in and was taking a year off...then I never went back. At that time, no one ever even discussed such a thing as social anxiety or panic attacks......I was sure they would think I was a freak....and was scared to death to tell them. I know now that if my child suffered, I would want to know about it so that I could help in any way. And as I look back, they probably would have had no idea what to do! But you and your parents have more options today than I did. There's all kinds of material out about it...there are ways to educate yourself about it...there's medicines to help....back then I went to a couple of psychiatrists and that accomplished nothing....and I just quit...just quit trying...so embarrassing....please don't quit!! Please fight it with all you have! Which means getting all the help you need! Which means...tell them! (or the one of them you can talk to the easiest). You can do it! (Unless they are just terribly unreasonable people)..how old are you? if you don't mind me asking?