flesh to bulge and nothing to do with excessive fat!!!
You at high risk if your
nutritional intake and fat levels are too low.
It can affect development, performance, cognitive function, hormones,
neurological function, energy levels, etc.
In addition, being 13 and growing, your body has many demands, which will not be met, if your diet is inadequate.
You should talk to a holistic nutritionist who is knowledgeable in this field.