1. Rashes
Unusual side-effects of stress can include a person experiencing rashes and hives on the skin, as stress can cause inflammation of the blood cells.
2. Weight Gain
Even if you have been eating healthy and you still experience weight gain, you could be under extreme stress, as stress produces a hormone called cortisiol in the body that can induce weight gain.
3. Digestive Problems
Side-effects of stress can include a number of digestive problems like acidity, heart-burn, stomach pain, etc, as certain stress hormones in the body can weaken digestion.