Medically reviewed by Daniel More, MD Allergies occur when your immune system overreacts to allergens like pet dander, pollen ...

You should also see a healthcare provider if you have accompanying symptoms like fever, night sweats, or weight loss. Swollen ...

Other common symptoms are anal pain and feeling like there is a lump in your anus. There are a number of less common symptoms such as itching and changes to bowel habits. If the cancer has spread to ...