I am 3 months pregnant. It is been 1 month now and I have excess pain in my lower back. Doctors cannot give painkillers as Iam pregnant. Paracetomol has no effect on me. Using tolagin gel also. Gives relief only for half an hour. Phisotherapist gave me Tens therapy for 3 days. It gives relief for many hours. And also application of medical tape on back after having therapy releives. But now from 2 days I did not take the tens therapy and my low back pains like hell. Already taking medicines for folic acid, calcium, vitamin d3. I am thinking to buy tens machine but is it safe during pregnancy.