Mark 6:13 NKJV
And they cast out many demons, and anointed with oil many who were sick, and healed them.
The disciples of Christ were dispatched to minister on His behalf. They used oil as they brought healing to the sick. Since oil is a representative of the Holy Spirit and the anointing, we know that the Holy Spirit and the anointing are involved with healing.
1 Corinthians 12:9 NKJV: "to another faith by the same Spirit, to another gifts of healings by the same Spirit,"
So as we fellowship and commune with the Holy Spirit, we should be conscious of who and what we have in our presence.