I came across a product called Menastil today. It's a roll on that you apply on your skin in the area where you feel pain. I think it's only available in USA.
The main ingredient seems to be calendula oil (from the marigold flower). They are not very forthcoming on other ingredients on their website. I found a youtube video that says the oil smells horrible and they added other ingredients to make it smell better.
Therefore calendula essential oil on its own could surely have the same effect, is available in the UK and would work out cheaper possibly.
I can't seem to find side effects. Marigold flowers were used in the American civil war and WW1 to treat wounds so it has healing properties.
Has anyone tried Menastil or calendula oil for pain?