Dysplasia is the change in the size, shape or appearance of a cell caused by an external stressor. Normal cells can suddenly become abnormal an example of which is when cells become cancerous for example. These cells that undergo change can become normal on their own in a short time or stay like that for an undefined span of time.
The media can make you feel down on yourself. Everyone has different body and you could compare yours to someone really skinny and it will give you a negative feeling