White means it is yeast. This looks like candida alrignt. When it is not yet formed into long thread it is young candida. The long thread formation will drill into your intestinal wall and cause leaky gut. Here are a few pix of candida posted on the forum in the past:
Using a plastic love to apply zinc cream (any diaper rash cream will do) helps with the rectal itch.
JOck itch and cracked hands need extra moisturizing cream and vitamin B
You do know that vitamin B, magnesium and probiotics are the standard supplements you need to take. An intake of zinc supplement will help with the itch - selenium and zinc play similar roles so I alternate from one to the other now and then.