Pallor and sudden tremor, cold sweats, exhaustion, followed by severe pain in the abdomen, nausea and vomiting. These are the symptoms of congestion, or a digestive blockage due to a fast and intense temperature change.

"It is true that this condition occurs more frequently in summer, due to hot-cold changes and that it can have very serious consequences", says Ivo Boskoski, medical director of the Policlinico Gemelli Foundation in Rome. He also sheds light on 9 other myths and hoaxes about the health of our'second brain'