Our expert says:
You can ask your GP to give you a few water tablets and take 1/2 Moduretic per day for a day or three. One should actually rather use flight socks for these long flights to prevent swollen legs (they are expensive but really make a big difference) Try using something to loosen the phlegm like Bronkese syrup and steam yourself (put hot water and Vicks in a bowl and a towel over your head and breathe in the steam - just be careful not to burn yourself). Saline nosedrops (ask at pharmacy or make yourself - 1 cup water plus 1/2 teaspoon salt and 1/2 teaspoon bicarbonate of soda) may help to soften the phlegm in the sinuses.
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