SAD is officially recognized as a sub-type of major depressive disorder with seasonal patterns. If an individual experiences SAD, they may exhibit various mood changes and symptoms associated with depression. These symptoms include a persistent feeling of sadness and depression throughout most of the day, occurring nearly every day. Anxiety may also be present, accompanied by intense carbohydrate cravings and subsequent weight gain. Individuals with SAD often experience extreme fatigue and a significant lack of energy, making even simple tasks challenging. Feelings of hopelessness or worthlessness may pervade their thoughts, while concentration difficulties become apparent. Irritability and agitation are common emotional states, and individuals may perceive their limbs (arms and legs) as heavy. Loss of interest in activities that would usually bring pleasure, along with social withdrawal, can occur in SAD. Sleeping problems are prevalent, with individuals tending to oversleep rather than experience insomnia. Disturbingly, thoughts of death or suicide may arise in severe cases. In the case of summer SAD, distinct symptoms may manifest. These can include heightened agitation, restlessness, and increased anxiety. Decreased appetite leading to weight loss may be observed, and episodes of violent behavior can occur. Troublesome sleep patterns, such as insomnia, may also be experienced by individuals with summer SAD.