Annoying zits on walls Prusa Mini  

Seam Position

I think this is indeed the seam (layer start/end point). I'll let others give you tips to reduce it (I think playing with retraction and the extrusion multiplier are indeed a good starting point) but know that you can position it where you want using the Print Settings > Layers and Perimeters > Seam Position. Using for example the "Rear" setting, you can have your seam aligned on the rear of the part instead of being dispersed around the part at seemingly random locations. This may look better depending on the part you're printing. You can also use seam painting to put the seam exactly where you want.

PETG and others

This can happen with wet filament.  

RE: PETG and others

Doesn't look like wet filament to me, though. AFAIK (extremely) wet filament causes more of a "sandy" finish with lots of very small surface imperfections everywhere rather than more pronounced and defined zits like this. What's more, in the picture they seem to occur only on edges which points strongly to the seam.

Source: https://www.matterhackers.com/news/filament-and-water

Wet

You may be right.  The easy way to tell is dry it.  No difference and it is not wet.  

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I tried that i have a sunlu dryer box and dried it for 6 hours after a few attempts just to make sure. Ill do the rear seam and see what happens.

I was going to suggest something similar. Paint on a seam. 

Doesn't look like wet filament to me. 

okay so i did the rear seam and these are the results i am still getting small zits on the corners and the main seam in one place. I also noticed a scar on the bottom layer so maybe its a nozzle height issue ?.