Allergic to Soap?

We have known since Tia was a baby that she has some allergies, but we aren't 100% sure to what, yet. The doctor's really can't say anything for sure until she turned 2 and the minute she did, they said she has some allergies. So we are going to set up an appointment to take her in so we can find out what allergies she may have. Until then, we have our guesses. I know every time Chris is affected by high allergy season, so is Tia among other things. Chris has a lot of allergies, but nothing that is too over the top. He is allergic to cats and candles and certain things. We were told by the doctor to not give her a bath every day and to not use soap most of the time. She has skin allergies and she gets affected in certain areas. Some times when it gets really bad, behind her knees and on her elbows get really dry and she scratches until it bleeds. We have this ointment that we put on her when she starts to itch and we hope it will help. The other night, I used a new bubble bath and when I got her out of the bath, she had tons of red welts. At first, I wasn't sure if they were there before the shower, but I would have noticed. Plus Tia was saying 'owie' and pointing to them. So we put on the ointment. Then the next night and decided to put the bubble bath through the test and sure enough, the welts showed up again. So no more bubble bath for Tia. The welts did go away by the time she went to bed. So I am wondering if she gets hives in certain situations? Either way, I hate that she has allergies, but there could be far worse things. I know she'll deal with them accordingly and take some pointers from her daddy.