What is this?

Question

I was thinking potentially heat bumps or Baby acne. They feel hard and they are in clusters.

Answer

I'd call my pediatricians office and ask them. Thats what I've always done. My daughter had something similar and her pediatrician prescribed some type of cream. 
Just call up there. A nurse will tell you what to do and if they think its severe enough to come in to see the doc. 
Most of the times I've called, they gave me remedies to try at home. They are always very helpful, esp when it comes to babies and children

Answer

My daughter gets this. I starting using coconut oil and it’s cleared up. Every time I use Aveeno lotion it happens so maybe your baby has sensitive skin like mine? Just a thought.

What is this?

The Top Baby Tracker App: Embrace New Beginnings with Tender Care

The Top Fertility Tracker App: Your Path to Achieving Pregnancy

The Top Pregnancy App: Nurturing Your Journey to Motherhood

The Top Period Tracker for Empowering Your Menstrual Health Journey