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Lethargy – A state of sluggishness, tiredness, or lack of energy.
Lung pain – Discomfort or pain in the chest area, which may indicate lung conditions like pneumonia or pleurisy.
Limping – Difficulty walking or uneven gait, often due to injury or pain in the leg.
Liver pain – Discomfort or tenderness in the upper right abdomen, which may indicate liver disease.
Low blood pressure (Hypotension) – Abnormally low blood pressure, leading to dizziness or fainting.
Lymphedema – Swelling, usually in the arms or legs, due to a buildup of lymph fluid.
Lichen planus – A skin condition that causes itchy, purple patches or sores, typically on the wrists, ankles, or mouth.
Leg cramps – Sudden, painful muscle contractions in the legs, often occurring at night.
Lacerations – Deep cuts or tears in the skin, often caused by injury.

Lack of motivation – A diminished desire to engage in activities or accomplish goals, often seen in depression.
Labile mood – Rapid and extreme mood swings, often due to emotional instability.
Lethargic thinking – Slow or impaired thinking, often seen in depression or fatigue.
Loneliness – A feeling of social isolation or lack of meaningful connections with others.
Lack of concentration – Difficulty focusing or paying attention, commonly seen in ADHD or stress.
Low self-esteem – A poor self-image or lack of confidence in oneself.
Loss of interest (Anhedonia) – A complete lack of interest in activities that were once enjoyable, often associated with depression.
Lack of empathy – Difficulty understanding or caring about the feelings of others, which can be seen in certain personality disorders.