Originally posted by AlphaTrion:

If you're running from the deathsquitos with your sword and shield out hit R it will put the shield and sword on your back. Deathsquitos will hit the shield as you're running away.

I'm not aware that a shield does anything if you're not touching the block button. I am unable to find any reference that backs up the claim that a shield will protect you from rear attacks. Are you running a mod to allow this?

Counterintuitively, running away from a deathsquito is the worst thing you can do once it is aggroed. They move faster than you, fly over terrain, and running will only drain your stamina. It is better to stand your ground. Nearly any weapon will one-shot a deathsquito; you simply need good aim (bow), good timing, or a parry.