We’re staying with the medical for this month’s self-portrait. As long-time readers will know I have Obstructive Sleep Apnoea, which means I can stop breathing when asleep. To counteract this, I have a CPAP machine which pumps air into my airway overnight to keep the airways open. It isn’t invasive, just a nuisance, and it does cramp one’s style somewhat. As you’ll appreciate from the image, us users are sometimes colloquially termed “hoover heads”. This is my usual sleeping attire!