Hairfall n skin tone. Me the solution!

My baby boy was born on March 26th 2016. He has hairfall problem now. How to overcome from this problem. Me n my husband also had dandruff and hairfall problem. My baby was exclusively breastfeeding. I'm giving mashed banana n Apple cerelac for my baby. When I'm using baby oil for his massage His skin color was changing. At the early days of his birth we used bath powder at once only he got rash on his skin we consulted dermatologist. He suggest moiz cleansing lotion for his bath n dosetil lotion for body application after bath. Till now we are using the same lotion. If I change the lotion dosetil to any other like aveeno r Himalaya baby cream my baby's skin color was changing. For these problems what I have to do please suggest me the solution