If a bump on the lower eyelid is soft to the touch, painless, and sometimes mildly itchy, it may be angioneurotic edema or allergy-induced dermatitis, which sometimes resolves on its own without treatment. If a round subcutaneous nodule, single or multiple, is palpable on the lower eyelid, is not painful to the touch, is not adherent to the skin, and has normal skin, a lid gland cyst is usually considered. If the lower eyelid first appears as a distinct nodule, which is mildly itchy or red and swollen, and then gradually worsens, and if the nodule softens and develops a yellow pustule, it is usually considered to be caused by blepharitis. If trauma to the eye results in rupture of the small blood vessels under the skin, this can also cause a subcutaneous hematoma on the lower eyelid, which usually appears as a distinctive bruise. In addition, flat or slightly elevated lesions on the lower eyelid with clear borders and pigmentation on the surface may also be pigmented nevi. Therefore, if you find a mass on the lower eyelid that does not subside, you still need to go to the hospital for prompt medical attention.