Micro-seasonal Emotional Stress Syndrome

Summary
No matter how much humans have tried to recreate a semblance of their native time scales, the long periods of light and dark make people susceptible to a condition known as Micro-seasonal Emotional Stress Syndrome (or MESS) which manifests as insomnia, paranoia, hallucinations, anorexia, tremors, and uncontrollable mood swings. Newcomers are given a series of drugs and inoculations when arriving on the planet, one of which is the very important cocktail created to help combat the condition. If the symptoms are noticed early on, it can usually be easily treated with drugs that induce sleep. However, if left untreated (or is not treatable), the condition can be potentially fatal. For those who have ancestors stretching back to the first colonies, MESS is extremely uncommon as most people who suffered from it did not live long enough to pass on their susceptibility.