If the anterior fontanelle is sunken, it can be from dehydration and/or malnutrition. See your paediatrician to diagnose the appropriate cause and institute the right management. General prevention, exclusive breastfeeding and immediate treatment of diarrhoea with ORS or other appropriate fluids.

Anterior fontalle is an area devoid of bone on the front of baby head. It is absolutely normal and it usually closes around 2 years old on it's own. But there is nothing to wrong if it closes earlier. See a pediatrician if you are so worried.

Try to place your finger tip on it. Check if it swollen, deepened and pulsating.

You don't need to apply oil several times a day. Just use a little after shampoo to prevent the scalp getting dry. Not the religious ones of always keeping oil on the fontanelle. Wearing cap is highly unnecessary most especially in a hot weather. Just ensure you always dress your baby according to the weather.Those living in cold temperate regions can wear caps more.

All is well with your baby. The ANTERIOR FONTANELLE usually closes between 12 to 18 months. You don't always have to see it pulsating or breathing. It may be more feasible in some children than others. Best wishes.