ADHD and Seasonal Change: Why Symptoms Shift With the Sun
Briefly

ADHD and Seasonal Change: Why Symptoms Shift With the Sun
ADHD is a neurodevelopmental condition affecting attention, emotional regulation, and energy. Symptom intensity can change across seasons, with winter often bringing more difficulty managing symptoms and more feelings of being blue and nervous. Summer can bring higher energy and improved ability to manage distraction, while sleep may become more elusive. Research indicates that people with ADHD may be disproportionately affected by seasonal patterns, including higher likelihood of Seasonal Affective Disorder in winter and more sleep issues in summer. Seasonal effects can also influence diagnosis timing, with higher ADHD diagnosis likelihood reported in early spring when symptoms peak. Inattentive symptoms decrease with greater sunlight exposure, and vitamin D is linked to symptom management.
"ADHD is a neurodevelopmental condition that affects attention, emotional regulation, and energy. Unbeknownst to many people, the nature and intensity of symptoms can change over time. They actually evolve with seasons. Now that summer is close, many people with ADHD may notice that the winter funk is slowly leaving. Energy may feel higher, distraction becomes easier to manage, but sleep may become more elusive. It's not just an impression, but something that seems to affect all people with ADHD."
"Studies show that in summer, people are more energized and chipper, while in winter, ADHD symptoms often become harder to manage, and people feel blue and more nervous. While seasonality affects all individuals, it appears that people with ADHD are disproportionately affected by it, with a much higher likelihood of having Seasonal Affective Disorder (SAD) in winter, and more sleep issues during summer."
"This effect goes as far as affecting how likely you are to get an ADHD diagnosis: A Dutch study of more than 5000 people found that people were more likely to be diagnosed with ADHD in early spring, when inattentive and hyperactive symptoms peaked, than in autumn, right after summer. The reason is that ADHD symptoms become much harder to manage during the winter months."
"Another study on 117 people with ADHD confirmed this and found that inattentive symptoms in particular decreased proportionally with sunlight exposure. In summer, people showed less intense ADHD symptoms; in winter, they flared up, with a peak around February and March. The likely reason is the correlation between ADHD and vitamin D levels. A recent review highlighted that individuals with ADHD tend to have naturally lower levels of vitamin D"
Read at Psychology Today
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