Knowra Asthenia Asthenia Asthenia is a state of physical weakness or reduced strength, often associated with illness, fatigue, or low energy. It describes a symptom rather than a specific disease.
Muscle weakness : Reduced ability to generate force with one or more muscles. Asthenia commonly presents as reduced physical strength, though its causes can be broader than muscle disease.
Anemia : A condition in which blood has reduced oxygen-carrying capacity, commonly because of low hemoglobin. Reduced oxygen delivery can contribute to weakness and low exercise tolerance.
Differential diagnosis : The process of identifying and comparing possible explanations for a patient's symptoms. Because asthenia has many causes, clinicians use this process to narrow its explanation.
Adynamia : A marked lack of muscular power or ability to perform movement. Adynamia emphasizes inability to exert force, while asthenia can include broader low-energy symptoms.
Fatigue : A subjective sense of tiredness or exhaustion that can impair physical or mental activity. Fatigue often accompanies asthenia but describes tiredness rather than diminished strength itself.
Hypothyroidism : A disorder in which the thyroid gland produces too little thyroid hormone. Low thyroid hormone can slow bodily processes and cause fatigue and muscle weakness.
Neurological examination : A clinical assessment of nervous-system function, including strength, sensation, reflexes, and coordination. Testing strength and reflexes helps determine whether reported weakness reflects a neurological deficit.
Lethargy : A state of reduced alertness and responsiveness, often with pronounced drowsiness. Lethargy concerns alertness, not physical strength, though both may accompany illness.
Muscle fatigue : A temporary decline in a muscle's ability to produce force after sustained or repeated activity. This localized, exertion-related decline helps distinguish muscle fatigue from more persistent generalized weakness.
Electrolyte imbalance : An abnormal concentration of minerals such as sodium, potassium, or calcium in body fluids. Disrupted electrolyte levels can interfere with nerve and muscle function, producing weakness.
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