This can happen to me in the summer, but it's mainly when traveling to hot countries that I swell... I've tried compression stockings for the plane.

Some individuals may experience water retention during periods of high heat. This can be caused by the dilation of blood vessels and water leakage into tissues. To help reduce water retention, it is recommended to consume less salt, stay active, change positions frequently, stay hydrated, apply cold water to the legs, and engage in massaging to improve circulation. Using compression stockings can also aid in blood circulation. If symptoms worsen, it is advisable to consult a healthcare professional for further advice before traveling to warm climates.