Edema after traveling on the plateau, and I gained weight 10 kg when I came home.

Edema during altitude travel may lead to weight gain, but weight gain is not only through increasing fat. Here are some possible scenarios:

1. Water retention: When traveling at high altitude, due to lack of oxygen and low air pressure, more liquid may be retained in the body, leading to water retention. This may lead to weight gain.

2. Increased appetite: Traveling on the plateau may increase appetite, because the body needs more energy to cope with hypoxia and low pressure. This may lead to weight gain.

3. Muscle gain: Travelling at high altitude may increase muscle mass, because the body needs more energy to cope with hypoxia and low pressure. This may lead to weight gain.

In short, edema during altitude travel may lead to weight gain, but the increased weight may come from water retention, increased appetite or muscle gain. If you gain more weight than expected, please consult your doctor to determine the specific reasons.