The Telltale Signs:

Persistent Sadness: While occasional feelings of sadness are a normal part of life, low-level depression involves a pervasive sense of unhappiness that lingers for weeks, months, or even years.

Fatigue and Low Energy: Individuals with low-level depression often report feeling tired or lacking in energy, even after a full night's rest. This ongoing fatigue can make it difficult to participate in daily tasks or find enjoyment in usual activities. 

Changes in Appetite or Weight: Changes in appetite or weight—either increased or decreased—can be significant indicators of low-level depression. Some people may experience overeating as a form of comfort, while others may lose interest in food altogether.

Difficulty Concentrating: Difficulty concentrating (one of the cognitive symptoms) is common in low-level depression, manifesting as difficulty concentrating, making decisions, or remembering details. This can affect work and school performance, as well as overall productivity.

Social Withdrawal: A tendency to withdraw from social activities or isolate oneself from friends and family members is another symptom of low-level depression. Even when surrounded by loved ones, individuals may feel disconnected or emotionally distant.

Feelings of Worthlessness or Guilt: Persistent feelings of worthlessness, self-doubt, or excessive guilt are prevalent in low-level depression. Individuals may criticize themselves harshly, viewing mistakes or setbacks as personal failures.

Sleep Disturbances: Not sleeping or oversleeping are common sleep disturbances associated with low-level depression. Irregular sleep patterns can increase feelings of fatigue and add to overall mood dysregulation.