<span>The third
trimester occurs on the 9th month of pregnancy. This means that the mother is
weeks away from the delivery. It is the time when mothers experience extra pressure on their
backs, their breasts start to enlarge, and the possible breaking of the
placenta that contains the baby. It is actually the home-stretch to a pregnancy
and is one of the most complicated parts of being a mother where pain and uneasiness
are extremely felt by a child-bearing mother. </span></span></span>
If you really can't move your arm because of the sting, and there is pus, the best thing you can do to yourself is go to the Emergency doctor. You can take an ibuprofen if the pain is too hard.