Other possible causes of itching include yeast infection around anus. People are advised to apply 1 ounce of sunscreen with a sun protection factor SPF of 15 or higher to their entire body 30 minutes before going outside.
External Hemorrhoids -image source — wikipedia.
Herpes around the anus could be the other cause of lump around the nose.
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In some cases, yeast infection may only present white patches on the vaginal walls, white patches in the mouth or the tongue. You can prevent this condition by keeping the groin clean.
While some bumps on anus are painless, they could be caused by a number of conditions ranging from common and benign like hemorrhoids to more uncommon and serious like anal cancer. These will always have the same symptoms.