Last summer we had a terrible time with Hannah and mosquito bites she would really swell up and the bites lasted for weeks some it took a few months for the skin to completely heal. I was hoping that her being a year older this summer would be better. It isn’t even summer yet and she is reacting to the bites. I have included pictures of her unfortunately they are kind of hard to see. I am hoping that some one out there will have some advice; a) for prevention & b) for treatment. Here she is you can see the redness on her arm.
Some closer shots she did not really like us taking pictures.

Here is the next day
And this is today
I think they are mosquito bites but they could be black fly I guess, however there was never any blood. Hoping someone has some good advice.
Thanks in advance!!!