Why Do I Feel Lethargic in Summer?

The main reason for physical fatigue in summer is the hot weather, which leads to a lack of energy and spirit. This is a normal physiological response and generally does not require excessive attention. However, if it affects daily work, it should be taken seriously. It is best to control the indoor temperature between 22-26 degrees Celsius. At the same time, eat more fruits and vegetables, and drink plenty of water to avoid heatstroke.

General body fatigue is a non-specific symptom that can be an early sign of liver disease, a warning sign of other diseases such as tumors, or even physiological, such as overexertion. Fatigue is mainly the patient's self-perception, with a certain degree of subjectivity. It is mainly derived from comparing with daily activities. For example, if a person can climb three floors at ordinary times, but now feels breathless and weak in their legs after climbing one floor, it is a sign of fatigue.

Generally speaking, the degree of fatigue in patients with liver disease ranges from mild fatigue to severe fatigue, which is consistent with the severity of the liver disease. If physical laborers have a too bland diet, it can easily lead to fatigue because the sodium in salt can enhance the excitability of nerves and muscles. Insufficient sleep can make people feel tired, but those with neurasthenia who take sleeping pills for a long time may also feel weak and tired. Other drugs that can cause fatigue include antihistamines such as diphenhydramine.

People who like to drink alcohol often feel tired; hungry people also feel tired due to a lack of protein and potassium; fatigue and weakness can sometimes be precursor symptoms of vitamin B1 deficiency, which is common in alcoholics. Fatigue in physical or mental workers is a normal physiological phenomenon, but it should be taken seriously when fatigue is felt after slight exertion.

Frequent vomiting and diarrhea and excessive use of diuretics can lead to general weakness due to low blood potassium levels; however, patients with high blood potassium levels may also feel weak, so blood tests are needed for differential diagnosis. Diabetes is the most common disease that causes fatigue. Due to abnormal glucose metabolism, reduced high-energy phosphate bonds, negative nitrogen balance, dehydration, and electrolyte imbalance, patients are prone to fatigue, weakness, thirst, weight loss, increased appetite, and frequent urination.

Anemia also often causes fatigue, including chronic anemia, iron-deficiency anemia with rapid onset, acute hemorrhagic anemia, acute hemolytic anemia, etc. These patients all have symptoms of fatigue. Patients with chronic nephritis often feel tired and weak, and because they need to eat a low-salt or no-salt diet for a long time, they are prone to potassium deficiency. Therefore, fatigue, insomnia, and low back pain are often their main complaints when seeking medical attention.