There is max current per port, and Vdd pin. That current is much lower than sum of all 20mA per pin. So you should not try to pull 20mA from each pin...
Pic should not get warm at all. Power...
In all the years I've been using PICs I've NEVER had one get even slightly warm.
They usually only pull a few 10's of mA's max, but I suppose if you had all the IO pins trying to drive too much...
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not trying to 'rain on your parade'..... it is possible that isn't where your noise is coming from...... if you haven't already, put a 10 or 100 microfarad electrolytical and a couple of .1 or .01...
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Re: PIC temperature, when is it too hot
This means that your PIC is sourcing (from HIGH output pins) 110mA to some loads.
Ioannis Today, 17:18Total power dissipation is about 600mW close to the limit at the room temperature. Better do something to reduce...