I think Maddalena is referring to lipomas.. I have them too... would love to know why they happen... they have nothing to do with a person's weight... skinny people develop them too.
A similar phenomenon occurs with calcium being deposited around the body [not in the bones] to people with gluten allergy.
Dedy
Maddalena wrote - >First, does anyone know why someone is prone to get fatty cells under the skin? They can be as small as a hazelnut or as big as a lemon. >Also, is there anything that can be done to prevent them from forming?>