Hi,
Welcome to the ehealthforum and I am glad to help you out. Pinworms infestation is quite common and the majority of the patients are asymptomatic. However, it has to be treated if thereâre any symptoms like the perianal itching. The treatment is done with mebendazole or albendazole. However, in the first trimester of pregnancy, these drugs are not used. They can be used during the 2nd or 3rd trimester and too only if the benefits outweigh the risks. The female worms usually come out at night to lay the ova and their movement is responsible for the itching.
I sincerely hope that helps. Take care.