Certified GKH Gardening Expert
What size container, and how long has it been in there? Do you fertilize regularly? A photo will help me to better help you.
I would recommend to put dolomitic lime, and wettable sulfur on top of the soil. This will keep the pH balanced, and keep any infections at bay. I would fertilize with a granular all purpose every few month. This will prevent many issues before they start, which is often more frequent in container.
This article will give you more information about growing figs in container in the meantime: https://www.gardeningknowhow.com/edible/fruits/figs/growing-figs-in-pots.htm
What types of products do you recommend? What happens if I don’t treat my tree with what you recommended?