Enamel of my upper incisors are rough to touch and thin but they are white (clean) and have no spots or tartar does it means i have enamel hypoplasia and do i need treatment or regular care will be fine? are those teeth more vulnerable to decay?

Regular dental care is very important to long term overall health. You should see a dentist at least once a year. They can also answer any dental questions you have about your specific situation after looking at your teeth. Doctors typically do not examine teeth in the detail that dentists do.

If you are referring to thinness of the biting edges, you may be grinding your teeth, usually at night. As the front teeth wear, the back teeth begin to interfere. You might need a dental appliance to keep the teeth apart and control the wear. And perhaps, restore the worn Emanuel edges with resin or porcelain to its original thickness and contour for both esthetics and function.

Thin enamel can be caused by excessive wear, especially if you have a malocclusion (bad bite) or pernicious habit such as grinding, genetic malformation, an eating disorder, or many other possible causes. You will need to see a Dentist for an examination/imaging/lab tests to determine if there are irregularities. If you have a malocclusion, you will also have to see an Orthodontist.