This chapter is a complete guide for Insult to Injury side quest. Here you can find tips that will help you to finish this quest in the most beneficial way.
Beginning the quest
After the fight with Corrupter go back to Mother's Heart. There, you must meet with Enara that tends to injured Nora warriors. When you talk to her, the quest is added to your journal. Your goal is to find a very powerful herb that can relive warriors' pain.
Both locations that are pointed by the mission marker are outside of Embrace's terrain. One of them is close to a campfire so you should use the fast travel system to get to it. When you arrive, you must climb on the only pole in the location and search the bag that hangs from it.
You can access the bag from the ground so you have to climb on the rock which is connected with the pole by a rope. Use said rope to get to the pole. The climbing ropes are on the east side of the rock.
The second bag can be found on the pole presented in the picture. This are Nora's hunting terrains so getting there may be dangerous but, with Focus' help, you can find a safe path. The easiest way to get on the pole is to climb the stone wall  and jump down on the bar .
You won't find the herbs in any of the bags. You must go to Mother's Rise village. There, you must speak with the woman called Fia. It turns out that the only person that can have the herbs is Jun. He is in a secluded place in mountains, in Mother's Crown region. If you want to get to him you must prepare yourself for a longer walk because the road requires a lot of climbing. This means that using your mount is pointless.
When you get there you discover that Jun is stuck in his hut. Examine both entrances to the hut and remove the blockade from the door. Jun informs you that a group of thugs attacked him and stole the precious herbs. After that, he was locked in his own hut.
Use Focus to find their tracks. They will lead you to the mountains. Follow their tracks and, after a while, you will see that the group is surrounded by a few machines.
You should not have any problems with taking out the machines because they are focused on the group of thugs that keeps firing at them. Regardless, be cautious and try not to attract any attention. When machines are defeated, speak with the leader of the thugs. During the conversation you learn about their motifs that made them steal the herbs. They will give you a few of them. Go back to Jun.
It doesn't matter which conversation options you choose. After that, the quest is completed and you get your reward.