The Impact of Autumn's Arrival on the Body and Its Countermeasures: How Your Body "Changes" with the Coming of Autumn — The Science and Guide to Sleepiness, Skin, Joints, and Mood

In autumn, due to shorter daylight hours and the effects of dryness and cold, it becomes easier to experience ① skin dryness, ② daytime drowsiness (increased melatonin), ③ joint stiffness, and **④ mood decline (Seasonal Affective Disorder: SAD)**. The Independent suggests moisturizing, staying hydrated, keeping warm, morning light exposure, moderate vitamin D intake, light exercise, and light therapy. The Cleveland Clinic explains that melatonin can become excessive in winter, and the NIMH states that SAD often begins in autumn or winter and improves in spring, known as the "winter pattern." On social media, there is a noticeable sharing of practices such as "feeling better with vitamin D," "summer pattern also exists," and "morning walks are effective." If symptoms persist for more than two weeks and interfere with daily life, it is advised to consult a specialist, including considering medical treatments (pharmacotherapy, CBT, light therapy). Knowing that daylight increases after the winter solstice (12/21) can also be reassuring.