Hello Joyce welcome to dermatalk skin care forum. Sorry for late reply...
Your condition from what u have described on first paragraph... looks like papular urticaria, an allergic reaction to insect bites.
As you said your family also have such problems, you seems to have inherited over-active immune system. Do you or your family have history of Atopic Dermatitis? or any allergies, asthma during childhood. Can you post a pic if possible, it could help us to exclude some common disease and find possible disease and cause...For whatever the reason your rash looks like hypersensitive reaction to something that you must try to find it..
Take a note, make a journal of what have u eaten and come in contact during the day. This way you can know what has triggered you such itching and rash. you may get a patch testing if needed. As you mentioned beef and seafood, all these tends to trigger urticaria, so avoiding such foods might help.