hi, Bleeding and spotting during the second trimester can also be a sign of premature labor. If your bleeding and spotting during the second trimester is accompanied by contractions, diarrhea, back pain, nausea, or other symptoms of labor, it may be that you are having premature labor. Premature labor is also very serious and must be treated immediately Most often, if you have some light bleeding and spotting during the second trimester, it is due to an issue with your cervix. During pregnancy, your cervix continues to become increasingly sensitive as time goes on. An internal exam performed by your health care provider, or even sexual intercourse, can irritate the cervix, which can lead to bleeding. While this is generally not too serious of a problem, you should still contact your health care provider if you believe that you are bleeding and spotting due to irritation of the cervix. might be a case of threatened abprtion too. u need bed rest and medications which wil relax ur uterus. byeeeee