I Am Getting Bug Bites In Beltline And Where Legs

I am getting bug bites in beltline and where legs join the body. not everyday but every few days. it looks like 1 or 2 mosquito bites, they respond immediately to hydrocortisone to stop itching and puffiness of the bites. they do not itch for more than a few minutes but it is annoying and can happen during the day, in and out of the house....no lasting bumps or bites for more than 20 minutes and has happened off and on for month or so