This kind of unexplained swelling is mostly functional edema.
Functional edema can be divided into the following conditions:
●High temperature edema When working in hot summer or at high temperatures, mild edema of the lower limbs or hands may sometimes occur. This may be due to hot stimulation, which causes the dilation of blood vessels on the body surface, increased arterial blood flow, or expansion and stagnation of superficial veins, resulting in increased capillary overpressure, and body fluids seep in the spaces between loose connective tissues under the skin to form mild edema. This kind of edema It often occurs in the feet and hands.
●Postural edema, also known as traveler's edema, occurs in people who have been walking or standing for a long time. For some people, after walking for a long time, the venous return of the lower limbs will be affected, and capillary leakage will increase, causing edema of the lower limbs; for some people, the venous return of the lower limbs will be blocked due to the need to stand for a long time, causing edema of the lower limbs.
●Obesity edema is more common in obese women, and the edema is located in the lower limbs. The reason is that subcutaneous fat increases in obese people, and blood vessels tend to expand, causing blood to accumulate. In addition, venous pressure in the lower limbs increases, and edema occurs. Obese people should strengthen physical exercise and lose weight appropriately, and the edema will naturally "disappear".
●Premenstrual edema. About 25% of women may develop edema 10 to 14 days before menstruation, mostly mild edema of the lower limbs. In severe cases, edema of the face and hands may occur, often accompanied by edema. Restlessness, irritability, insomnia, headache, breast tenderness. With the onset of menstruation, urination increases and the symptoms gradually disappear. Edema may occur in a few patients during menstruation or after menstruation.
● It is normal for pregnant women to have edema in late pregnancy. Because the enlarged uterus compresses the inferior vena cava, blood return is blocked, and mild lower limb edema is often present. However, it subsides after rest, there is no protein in the urine, and the blood pressure is not high. This can be distinguished from the symptoms of pregnancy poisoning.
●Senior edema: In old age, the functions of the heart, liver, and kidneys decrease, and the permeability of blood vessel walls increases, so edema often occurs. This kind of edema was found no abnormality after various examinations.
●Drug source, Huang Edema There are many drugs that can affect the water and sodium metabolism in the body and cause edema. For example, women who regularly take cortisone acetate, prednisone, birth control pills, indomethacin and other drugs can cause edema, but it will gradually disappear after stopping the drug. In addition, according to literature reports, edema in a small number of patients is caused by long-term use of diuretics and disappears after stopping the medication.
●Swelling of eyelids in the morning. Some people have swollen eyelids when they wake up in the morning. The reason is that during sleep, eyelid movement is reduced and blood flow is slow, resulting in an increase in local capillary pressure, driving fluid out of blood vessels and into the loose eyelid tissue, causing edema. This edema is not caused by disease.
●Idiopathic edema is edema without a cause, which is more common in middle-aged women. This kind of edema is mostly in the lower limbs and is related to emotions and posture. Worse when standing upright. It decreases when lying down, and the weight difference is 1 in the morning and evening. More than 4 kg (normal people are mostly within 0.5-1.4 kg).
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Reference: /yssl/1/2005/04/2817281024.htm