What is this hard lump near my anus that I can feel, and should I be worried?

A hard lump near the anus can be due to several reasons, but one common cause is a thrombosed external hemorrhoid. This happens when a blood clot forms inside a hemorrhoidal vein that lies under the skin around the anus, causing the vein to become hard, swollen, and sometimes tender. Although you describe the lump as not painful, many people do experience discomfort with hemorrhoids, but absence of pain doesn’t exclude the possibility. It’s also possible that the lump could be a skin tag, a benign growth where the skin issues from previous inflammation or trauma. However, less commonly, it could be something like an anorectal abscess or even a malignant condition like anal carcinoma, though the latter would typically present with more symptoms and changes in bowel habits. Given these possibilities, having this evaluated by a healthcare professional is a wise choice especially since your lifestyle, risk factors and overall health can influence the potential diagnosis. In the meantime, maintaining careful hygiene, avoiding constipation through fiber intake and hydration, can be helpful to prevent straining that might irritate the area further. This is not an urgent emergency but setting up an appointment with a doctor or a colorectal specialist would enable a more precise diagnosis and appropriate management plan. Keeping an eye on changes in the lump or new symptoms like pain, bleeding or rapid growth should also act as indicators to seek more urgent medical advice.