Braxton Hicks contractions.

Braxton Hicks contractions are a normal part of pregnancy that occur when the uterine muscles tighten and relax sporadically. They are also known as "practice contractions" or "false labor" pains.
 
Braxton Hicks contractions are different from true labor contractions in the following ways:
 
Pain
Braxton Hicks contractions are uncomfortable but not painful, while true labor contractions are painful.
 
Frequency
Braxton Hicks contractions are infrequent and do not increase in frequency. True labor contractions become more frequent as labor progresses.
 
Duration
Braxton Hicks contractions are short, lasting between 30 seconds and two minutes. True labor contractions become longer as labor progresses.
 
Location
Braxton Hicks contractions are felt in the front of the abdomen, while true labor contractions are felt throughout the abdomen and lower back.
 
Some common triggers for Braxton Hicks contractions include: Dehydration, A full bladder, Physical activity or sex, Illness that causes nausea or vomiting, and Your baby's movement.
 
To ease discomfort from Braxton Hicks contractions, you can try:
Changing your position or activity
Walking
Resting
Drinking water
Relaxation exercises
Taking slow, deep breaths
Drinking a warm cup of tea or milk
Taking a warm bath
Emptying your bladder
 
You should contact your midwife or maternity unit if you experience contractions that get stronger or closer together, or if you have other signs of labor