Depression, mental breakdown or trauma can be one of the reason for in adequate concetration.
Are you depressed? You've mentioned that you have had mental breakdowns before.
Depression is the leading cause of this. The only thing you can do in this situation is to visit a doctor.
Do you shake your legs alot when you are sitting down?
Can you sit in a place and listen to someone for straight 30 minutes?
Do you tend to think of something else when someone is speaking to you?
Do you get confused about reality and dreams?
If you said yes to any of them, you may have ADHD.
Again, in this case you'll need to visit a doctor.
Bipolar disorder can also be another reason.
Lastly, every medicine has its good and bad effects. Did you consult any doctor before taking the energy pills? If not, you should have.
Don't buy any stupid drugs to increase your concentration. Even though they make you 'bright' for a moment. they have bad side effects in the long run.
I read an article where this was stated:
Symptoms of chronic illnesses or metabolic disorders that may occur along with concentration difficulty
Concentration difficulties may accompany symptoms related to chronic illnesses and metabolic disorders including:
Abdominal pain
Abnormal heart rhythm such as rapid heart rate (tachycardia) or slow heart rate (bradycardia)
Changes in skin
Confusion or loss of consciousness for even a brief moment
Difficulty breathing or rapid breathing
Fatigue
Feeling very thirsty
Frequent urination, or reduced or absent urination
Fruity breath
Muscle weakness
Nausea with or without vomiting
Other symptoms that may occur along with concentration difficulty
Concentration difficulties may accompany symptoms related to other problems such as injury, stroke, dementia, or psychiatric conditions. Examples include:
Change in sleep patterns
Changes in mood, personality or behavior
Confusion or loss of consciousness for even a brief moment
Difficulty with memory, thinking, talking, comprehension, writing or reading
Impaired balance and coordination
Loss of vision or changes in vision
Nausea with or without vomiting
Numbness, weakness or paralysis
Seizure
Severe headache
Concentration difficulties can be caused by medical, cognitive or psychological problems or may be related to sleep disorders or medications, alcohol or drugs.
Psychological conditions that can interfere with concentration include anxiety, depression, bipolar disorder, emotional trauma, and stress.
Medical causes of concentration difficulty
Concentration difficulty may be caused by medical conditions including:
Congestive heart failure (deterioration of the heart’s ability to pump blood)
Head trauma
Heavy metal poisoning
Infections
Kidney disease (which includes any type of kidney problem such as kidney stones, kidney failure, and kidney anomalies)
Liver disease (which includes any type of liver problem such as hepatitis, cirrhosis, and liver failure)
Medication side effects (improvement may take time after drug discontinuation)
Metabolic disorders and certain vitamin deficiencies
Pain syndromes
Seizure disorders
Sleep apnea (pauses in breathing during sleep)
Stroke
Vision disorders
Cognitive causes of concentration difficulty
Concentration difficulty can also be caused by cognitive problems including:
Attention deficit disorder
Delirium
Dementia
Learning disabilities
Psychological causes of concentration difficulty
Concentration difficulty can also be caused by psychological conditions including:
Alcohol or substance abuse
Anxiety
Bipolar disorder (alternating periods of depression and elevated mood)
Depression
Emotional trauma
Post Traumatic Stress Disorder (PTSD)
Schizophrenia (severe brain disorder affecting thought processes and emotional responses)
Stress
Serious or life-threatening causes of concentration difficulty
In some cases, concentration difficulty may be a symptom of a serious or life-threatening condition that should be immediately evaluated in an emergency setting. These include:
Brain or spinal cord injury
Brain or spinal cord tumor
Delirium
Drug overdose
Encephalitis (inflammation and swelling of the brain due to a viral infection or other causes)
Heat stroke
Kidney failure
Meningitis (infection of the membranes covering the brain and spinal cord)
Seizure
Sepsis (severe infection of the bloodstream)
Stroke
Questions for diagnosing the cause of concentration difficulty
To diagnose your condition, your doctor or licensed health care practitioner will ask you several questions related to your concentration difficulty including:
How long have you had difficulty with concentration?
Do you have any other symptoms?
Do you have any difficulties with sleeping?
Do you have any medical problems?
Did anything such as an injury or illness precede the symptoms?
What medications are you taking? Are you taking any new medications?
Do you drink any alcohol?
Are you using any street drugs?
What are the potential complications of concentration difficulty?
Because concentration difficulty can be due to serious diseases, failure to seek treatment can result in serious complications and permanent damage. Once the underlying cause is diagnosed, it is important for you to follow the treatment plan that you and your health care professional design specifically for you to reduce the risk of potential complications including:
Developmental delays and failure to thrive
Learning disability
Paralysis or inability to move a body part
Permanent cognitive impairment
Permanent loss of sensation
Personality changes
Physical disability
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I will suggest you should consult a doctor.