How to solve the foot swelling after climbing?

During the journey, the position of the legs and feet is low, so the blood in the veins of the lower limbs can't flow back smoothly due to the gravity of the earth, and the blood accumulates in the veins for a long time, which increases the pressure of the blood vessels in the legs and feet, so the capillaries expand, and the water in the blood penetrates into the subcutaneous outside the blood vessels through the blood vessel wall, and the subcutaneous water accumulates more, resulting in swelling of the legs and feet. In addition, keeping the human body upright for a long time can also make the body secrete a lot of aldosterone, which can mediate the metabolism of water and salt, weaken the function of kidney to excrete water and salt, make a lot of water and salt stay in the body, and aggravate edema of legs and feet. In order to prevent leg swelling in tourism, we must pay attention to the following points: First, we should arrange the travel time and route reasonably, don't be too hasty, take a rest after visiting a scenic spot, and pay attention to the combination of work and rest. Second, pay attention to the change of posture on the way. After standing and walking for a while, sit or lie flat for a while and cross your legs. When taking a boat for a long time, you should raise your legs to facilitate the venous blood return of your legs and feet. Third, when traveling or climbing for a long time, it is best to wear leggings with appropriate tightness, or wrap a few wide cloth belts around your calves and fix them with pins. Fourth, after traveling every day, burn your feet with hot water to dilate the blood vessels in your feet and facilitate blood return. Fifth, in case of leg swelling of tourists, they should rest on their backs for a day or two, and raise their legs and feet above their hearts to facilitate blood return, and they will get better in a day or two. If the swelling of the legs and feet is still not relieved, please see a doctor for further treatment.