Botflys on scalp how wud i know if i had them?

Have scalp examined : Botflys are found in central & s. America, so if you haven't traveled there, don't worry. If you have been there and you develop a bump under your skin that continues to get bigger, then there might be a botfly larva growing in your scalp. Have your doctor look at it under magnification to see if there is a pore. If you put vaseline over the pore it may suffocate the larva and it may come out!