Swarm on Swarm Action?

[Lamontius]

okay so say I am a witch
and I have a swarm approaching me
which, is normally bad for a witch
since witches do not have a lot of anti-swarm options

what happens if I vomit a swarm towards another swarm?

do the swarms do their normal damage to each other?

or does it get super weird in a way I am no seeing, as per the rules?

Also, this is mostly a PFS question, around the level 6ish area, if peeps are curious

[The_Hanged_Man]

Personally, I would treat the damage they inflict on each other as area effect. Swarms inflict damage on anything within their area, and it seems logical that they would be able to harm each other.