When you are four months pregnant, the symptom of itchy nipples is normal. Because after pregnancy, the body estrogen and progesterone levels rise, will easily lead to increased lactin secretion, which will appear nipple and breast enlargement, swelling, uncomfortable feeling, and in some cases, a slight swelling pain. This is a normal condition and there is no need to be overly nervous. During this period try to pay attention to hygiene, pay attention to cleaning, do not wear too tight underwear, to avoid leading to blood circulation is not smooth, it will easily lead to the symptoms of swelling aggravated. Usually pay attention to do not eat spicy stimulating food, should pay attention to observation, to see if the nipple has the phenomenon of bleeding, there is no sign of redness and swelling, if the nipple development is normal, do not need special treatment.