Why do cold symptoms feel worse in the morning?

You are not imagining the pattern, and it is not the cold worsening - it is the overnight build-up meeting the morning. Three things stack up while you sleep. First, mucus: lying flat for hours lets it pool in your sinuses and drip down the back of your throat, so you wake congested, coughing, and with a sore throat that has been bathed in drip all night. Second, drying: you went 7 or 8 hours without a drink, often breathing through a blocked nose, so every surface from nose to throat is parched and raw. Third, the fight itself: your immune system runs hot overnight, and that inflammatory work - the actual cause of cold symptoms, since the misery comes from your response, not the virus directly - peaks just as you wake, dehydrated and unrested. Then the day rescues you: standing drains the sinuses, a hot shower steams things loose, water rehydrates the throat, and by late morning you feel almost human - which is the reassuring tell that this is mechanics, not deterioration. Help the morning along: water on the bedside table for the first wake-up, a steamy shower, honey and lemon for the throat, and propping your head a little higher at night to reduce the pooling. The NHS says a cold clears in 1 to 2 weeks - but symptoms worsening after about a week instead of better, a fever that returns, or ear or sinus pain that escalates suggest a secondary infection and deserve a look. Pymander is a free AI doctor, 24/7 by text, that can help you judge the curve.