Allah has mentioned in the Qur an that those who are sick or traveling during Ramadan can fast some other time. Some jurists have also considered those who are involved in hard labor which is necessary for the community. If fasting may injure their health or the performance of their sensitive work, then they are also allowed to fast later or to pay the Fidyah instead. In case they are not able to make up later then they are allowed to give Fidyah, which is providing a day s meals to a poor person for every missed fast of Ramadan. During the month of Ramadan we are not allowed to taste anything.
Lip balm is like oil or cream.
It has no taste and no food value. As it is not forbidden to put oil on the body during fasting, it is also not forbidden to use lip balm. I have a question in regards to the Witr prayers with the Isha Prayer. It is better to make Witr the last prayer of the night. If you are sure that you will get up for the Tahajjud prayer, then you should not pray Witr with Isha prayer and do it after the Tahajjud.