Chronic stress at work often triggers what is known as the “weekend cold,” when the nervous system reacts as a person finally relaxes. The risk of flu and common colds also increases due to the natural rise in social activity during non-working time. British general practitioner Simon Feldhouse told the Daily Mail.

“Many people work under deadline pressure in the run-up to the holidays, and then wake up at the start of their time off with a fever, body aches, or a harsh cough that threatens to ruin their vacation plans,” the expert noted.

According to the doctor, feeling unwell after finishing work is a well-recognized phenomenon sometimes referred to as “weekend illness.” Its main culprit is chronic stress, the symptoms of which are suppressed for long periods.

“There is also a simple biological explanation: holidays often involve travel, disrupted sleep patterns, dietary changes, alcohol consumption, and increased social interactions—all of which create ideal conditions for infection if the immune system is already weakened,” the physician warned.

The doctor added that preparing the immune system in advance can reduce the risk of flu and respiratory infections during the pre-holiday period. Several weeks before the holidays, Feldhouse recommends switching to a healthy diet that includes more vegetables, fruits, and protein.

“Useful supplements include vitamin D, vitamin C, zinc, omega-3 fatty acids, and selenium. However, experts caution against long-term zinc supplementation, as it can cause stomach upset and interfere with mineral absorption,” the therapist added.