Hi. My baby 5 month is suffering from red severe rashes(both patches and red dots) around neck and chest area from few days(uploaded the image). She drolls a lot. We have asked to use Hydrocortisone cream by one the paediatrician. After applying this cream the red patches are turning to white color so we stopped using it.The rashes got very intense ans spread over the neck and chest area so we again consulted other paediatrician. We have been to asked to give Altrax syrup and prucal lotion. Was that rash is due to excessive drooling or is it some sort allergy? Is it okay to use prucal lotion will it help to reduce rashes and how long will it take?