My doctor said i have thickening around my heart valves. is that bad? what does that mean?

See a cardiologist: I would suggest that you see a cardiologist and have echo cardiogram. This will further define the problem and dictate therapy

Valve thickening: Hi, Fibro-calcific degeneration (thickened valve) most commonly affects the aortic valve. This happens usually in older people and people who have longstanding high blood pressure, also advanced age. This could make the valve narrow and cause Valvular stenosis which the amount of blood flow could travel through the valve decreases. Were you told that you have stenosis,too or just thickening?

May be: You have serious heart condition at young age. Do you have some congenital ( from Birth) Heart Disease? Or Are you over weight? Obviously you are under care of Cardiologist so ask him/her what it means to have thickened Heart valve. Without seeing a report I cannot interpret and give you conflicting explanation