Pregnant almost six months belly button suddenly like a pinprick feeling, may be physiological phenomenon, may be gastrointestinal tract dysfunction, if at the same time a small stomach tightness and hardness of the situation, there may be a priori miscarriage and so on. 1. physiological phenomenon: navel suddenly like a pinprick, may be only occasional neuralgia, may be associated with a relatively large amount of fetal stimulation, uterine spasm. As long as it does not occur frequently and lasts for a short period of time, it can usually be observed first. 2. Gastrointestinal tract dysfunction: navel tingling, may be cold or eat inappropriate and lead to gastrointestinal tract spasm, generally as long as pay attention to warmth, drink more hot water, pay attention to the structure of the diet can be relieved. 3. aura miscarriage: if the navel tingling at the same time touching the small stomach has a more sustained tightness and hardness, or more frequent uterine contractions, or part of the female vaginal bleeding symptoms, there may be a miscarriage, need to be checked as soon as possible. Pregnancy navel suddenly like a needle prick, can not be relieved soon disappear, need to go to the examination in time to clarify the cause, under the guidance of the doctor for diagnosis and treatment.