What causes seasonal affective disorder and how can I manage it?

Seasonal affective disorder (SAD) is a type of depression that occurs during the same time every year, typically in the winter months when the days are shorter and there's less sunlight. The exact cause of SAD is still not fully understood, but it's thought to be related to the lack of sunlight, which can affect the body's internal clock and the production of certain neurotransmitters, such as serotonin and melatonin, that regulate mood, energy, and sleep.

It sounds like you're experiencing some common symptoms of SAD, such as feeling sluggish, depressed, and lethargic, as well as sleeping more than usual. Establishing a consistent routine, exercising regularly, and eating a balanced diet are all great steps to take, but it's clear that you may need to try some additional strategies to manage your symptoms. One effective treatment for SAD is light therapy, which involves exposure to a specialized bright light that mimics natural outdoor light. This can help regulate your circadian rhythms and improve your mood.

In terms of lifestyle changes, getting outside during the daytime can be really helpful, even on cloudy days. Taking a short walk outside during your lunch break or doing some stretching exercises by a window can help increase your exposure to natural light. You can also try using a light therapy lamp or box in your home, which can be especially helpful on days when you can't get outside. Additionally, practicing stress-reducing techniques such as meditation, yoga, or deep breathing exercises can help alleviate symptoms of SAD.

If you're finding that your symptoms are severe or persistent, it may be helpful to seek professional help from a mental health professional. They can help you develop a personalized treatment plan, which may include therapy, medication, or a combination of both