You are twenty five should not have back pain is your travel two or four wheeler
Yes travelling can be reason for your pain practise correct correct posture and do exercise for your back
Best remedy for back pain take complete rest
Depends on how are you travelling. Try to brace your abdominal muscles by tucking them in when there is a bump. Your can practice it otherwise as well during travel. Keep a towel roll in your lower back region. It may also ease your pain.
Improper exercise techniques or sitting posture can cause a muscle pull leading to spasms or sometimes strenuous activities can lead to sprain which might be a cause. If that's the case then you need to take rest for few weeks and apply hot fomentation to the painful regions. Sometimes people with a sedentary lifestyle,who have never done any hard workout will have muscle pain even for doing workout for 1-2days if that's the case, no need to worry.the pain usually subsides within few days. Do exercise for atleast 15-20 mins to build up stamina once you recover ...Consume lot of water to stay hydrated and never compromise on that. If you restrict on water consumption,chances of dehydration and fatigue along with it is more. Consume proteinous and healthy foods like egg white, berries, fresh sprouts,skimmed milk,oats, brown rice, fresh vegetables.avoid junk foods,oily and spicy food. If not satisfied consult a orthopedic surgeon for further queries...