Hi there,
Just to chip in too, some formulas are "Partially hydrolysed -> partially broken down" like Nestle Good Start and then you get the others like Nutramigen and Alimentum as previously mentioned. These two are "Extensively broken down". In the UK there is another formula named Pregestimil added to the repertoire.
As Andrea said manytimes there is enough recognisable protein structure left for the baby to still react to and then you should switch to an Amino acid based formula. These formulas are made of the building blocks of protein, so babies get the goodness and can grow and utilise the amino acids to thrive, yet not have the problems with MPI (Milk protein intolerance). The formula that is AAB is Neocate.
As Wendy said, you can try a soy formula - I know there is quite a bit of controversy regards to soy milk as it has phyto estrogens etc. You will have to speak to your doctor about that. However if you decide to go for soy milk, about 50% of babies that react to MP can react to soy protein as well.
Many babies that are MPI have symptoms of reflux and that can cause many other issues including wheeziness and nasal congestion. Skin disorders make out quite a large proportion of the manifestation of MPI and may improve off MP, but may not necessarily resolve 100%.
Speak to your doctor and formulate an action plan. Your doctor might say it is just eczema and treat it as such. Why do you specifically think it is MPI?
Just to say, my sister's son had a very similar story to yours. He was breastfed but when they went to church she would give him a bottle of formula milk. He developed the most horrendous rach which the first time they thought was a heat rash. But when it happened again, they realised it must be the formula - she ate LOADS of milk and cheese products whilst BF and had no issues ( wish we were taht lucky!!
) So they changed to soy and he has been fine since. He is 19 months old though and everytime he gets any milk products in, his cheeks turn a bright red and it looks like he was slapped. ( which he wasn't, I hasten to add
)
HTH to some extent.
xx
DI