Garlic
Garlic is referred to as the cousin of an onion. They are both parts of the allium family. Garlic also contains the antimicrobial substance (allicin).
You can press the juice from a clove of garlic and place it directly on the boil, then cover it with a bandage. Mixing onion juice with garlic juice can be very potent. Garlic juice can also be used to prevent infection in boils. But you have to wash after, to remove the smell.
Using too much garlic can also cause a rash. It is best to use it moderately and report immediately to a doctor if you notice anything strange.
Conclusion
Boils mostly form when pus accumulates beneath the skin. When it is caused by an infection, it is called furuncle. If the boil doesn’t go after these treatments, you should see a doctor.
Reference:
[1] https://www.medicalnewstoday.com/articles/318405
[2] https://www.medicalnewstoday.com/articles/322047
[3]https://www.mayoclinic.org/diseases-conditions/diarrhea/symptoms-causes/syc-20352241#:~:text=Diarrhea%20%E2%80%94%20loose%2C%20watery%20and%20possibly,more%20than%20a%20few%20days.
[4] https://www.sciencedirect.com/topics/engineering/ricinoleic-acid
[5] https://www.hairguard.com/clogged-blocked-hair-follicles/
[6] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6271412/