In a infant those rashes are common and are usually not to worry if the child is feeding well , sleeping well not cranky , active, passing urine and stool normally

Hello From the picture it could be either mosquito bite or could also be heat rash. Do not apply oil on those rashes. Apply mild moisturiser which you have been using.Trim baby’s nails to prevent scratching. If these rashes increase in size, redness consult your paediatrician.

Wait and watch.

Apply t bact cream

It looks like insect bite or scratch mark due to nails

These are Newborn rashes

Greetings It is completely understandable to worry about finding a new bump on your baby's skin. These small nodules on the ear and neck are often harmless, swollen lymph nodes reacting to minor irritations or unseen insect bites. Please stop applying massage oil to the bump, as this can irritate the skin or clog pores further. Monitor your baby closely for warning signs like a fever, spreading redness, tenderness, or rapid growth of the lump. An in-person clinical examination is the only reliable way to accurately determine the exact cause of the swelling.