Bastion:
Can Warforged GET queasy or experience motion sickness?
RAW? Short answer, yes. You're a humanoid sadly
quote:
Constructed Resilience. You were created to have remarkable fortitude, represented by the following benefits:
You have advantage on saving throws against being poisoned, and you have resistance to poison damage.
You don’t need to eat, drink, or breathe.
You are immune to disease.
You don't need to sleep, and magic can't put you to sleep.
Lore? Long answer, your body is made up of a frame of stone and twisted darkwood veins and musculature, covered by metal plating. A sense of equilibrium is included for some reason, likely as part of the "hydraulics" that make up your circulatory system.
But! Chronicles of Eberron just dropped, and you know your boy Beren was in the first hour purchasers. Behold, a new optional trait for warforged to be discussed with your DM
quote:
Living Construct
To reflect the warforged's dual nature, you can add the following traits to your warforged character.
Creature Type. You are a Construct.
Living Construct. The livewood and alchemical fluids in your body allow you to benefit from several spells that preserve life but normally don’t affect Constructs: cure wounds, healing word, mass cure wounds, mass healing word, and spare the dying
Does this allow you to avoid Con checks for queasiness? Not in the slightest, but ask your DM!