Small Insect bite, itching resistant to epinephrine injection, pills and creams, getting worse?

Hi , I am (…) from china , my Girlfriend has been bit by very small insect look like mosquito in a park , after two hours she begin scratch but it is not so bad as it is at night until morning its worse , it has swollen , itchy very reddish , she went to a clinic doctor inject a epinephrine , and three other injections. it was ok and comfortable till 4 to 5 hours then again she wants to scratch she injected second day then doctor said now just take pills and it will be fine , but it could not even no after a month its still like this in between some days it was just ok she thinks it almost recovered but no after a month gradually it is worse and worse now this is her second day to inject but she still want to scratch , My question is what we should do ? why it is not recovering , we used different pills and cream but for some time till that cream is there no itchy but later on it again itchy …