1983 D Penny Error's? Help Identify?

Are they raised bumps? The ones on the neck look like they are.

The mint had issues with the plating bubbling on the first couple of years of zinc cents. that is what you have.

Here is a better example



This was caused by problems with the plating process and is most common on cents minted in the 1980's, but can be found on any cent minted after 1982 when Copper plating was first used. Gas bubbles would become trapped beneath the Copper plating and cause these raised areas. They seem to be more common on cents from the Denver mint. Solid-alloy cents minted in 1982 and earlier can have occluded gas bubbles caused from heat generated when a planchet is struck. The expanding gas pushes a layer of metal towards the surface of the coin, resulting in a raised area or bubble. Occluded gas bubbles are much rarer than the blistered plating found on newer cents.
http://www.lincolncentsonline.com/m...laneous.html

I should mention that foaming causes the gas that cwb speaks of as does poor pre-treatment (cleaning).