Dopamine is a neurotransmitter found in the brain. It has several functions and roles in the brain, including supporting motor functions and mood. Dopamine can also influence your body's hormone levels. Some recreational drugs work by flooding dopamine receptors with the brain chemical, which can create a sense of happiness and euphoria in individuals. However, dopamine levels are not constant from one person to the next, and low levels of the chemical can show itself through several signs and symptoms.
Depression
Depression is one of the most common symptoms of low dopamine levels, and it is often associated with the brain chemical. According to SimplyVital.com, low dopamine levels causing depression can be identified in several ways. Individuals with low dopamine may struggle or be unable to feel pleasure, love or a sense of attachment to others, which are all symptoms of depression. They may also exhibit apathy or a lack of remorse and be easily distracted. Individuals with depression often feel tired and uninterested in doing activities. Individuals that become addicted to a dopamine-stimulating drug may experience these symptoms at an increasing rate when not taking the drugs, increasing their perceived need to take the drug as a means of finding happiness.
Hormonal Changes
Low dopamine levels can create hormonal changes in both men and women that affect the body in different ways. Women may notice low dopamine levels exaggerate the symptoms resulting from their declining estrogen, particularly in middle age. More intense hot flashes, night sweats, mood swings and trouble sleeping at night are all possible effects. Men can experience a decline in testosterone levels, which can lead to decreased muscle mass and increased body fat, diminished physical strength and endurance, reduced libido, and increased cholesterol levels in the body, according to SimplyVital.com.
Parkinson's Disease
Parkinson's disease is often triggered by low dopamine levels in the brain. This is a disease affecting the central nervous system, and it is degenerative, according to the University of Maryland Medical Center. Symptoms of this condition include tremors, which often start in the hand and expand throughout the body, as well as slowed motor function. These symptoms are the result of the breakdown of dopamine in the brain. No cure has been found for Parkinson's, although medications can help control the symptoms.
