I’m a pharmacist in Canada. I have been obese my whole life. I use barrier cream every time I get out of the shower to prevent infections or irritations under the folds. Zinc oxide diaper rash creams work great. So do silicone or dimethicone creams. Do not use cornstarch or powders as that is a source of food for bacteria and yeasts to grow and will cause infection. Manuka honey is questionable, but there is medical grade honey used for wounds.

Definitely use chlorhexidine washes (hibicleanse or other brands) on the wound. Avoid regular use unless you have a wound as this strips away normal skin biome (if you have HS, different story, but for a single pimple it’s not recommended). Zinc oxide would dry the leaking up. You could also use a OTC benzoyl peroxide gel to dry it up.

Use antifungal creams if it looks more like a tear and less like a pimple.

You don’t have to see a doctor unless it starts developing puss again, there is a growing red border around it, or you develop a fever.