Found this info Sami, hope it helps
"Although considered painless when compared with true labor contractions, Braxton Hicks can be very uncomfortable. You may notice Braxton Hicks come more frequently when doing light physical activity like vacuuming or carrying groceries in from the car. If you feel discomfort, try lying down and relaxing or getting up and walking around. Listen to your body. Changing your position may stop the contraction all together.
Some doctors recommend drinking a few glasses of water to help diminish Braxton Hicks contractions as they can sometimes be brought on by dehydration; as a rule, a lack of adequate fluid intake can make the uterus more irritable - another good reason to drink those eight glasses of fluids daily during pregnancy!"
The dehydaration one is good for me as I am a nightmare for drinking enough, and am always getting dehydrated.