A red bump on your baby’s lower eyelid can be caused by blepharitis, blepharocysts and allergies. 1. Blepharitis: acute purulent inflammation of the sebaceous glands or blepharoplasty glands near the eyelash follicles, with Staphylococcus aureus infection being the most common. Clinical symptoms are limited redness and swelling of the eyelid skin, hot and painful, also can be accompanied by pre-auricular, submandibular lymph node swelling, generalized chills, fever and so on. 2. Blepharophalangeal cyst: It is a chronic non-suppurative inflammation formed by the obstruction of secretion discharge from the blepharophalangeal glands and retention of secretion. Clinical manifestations of painless lumps, can be felt in the skin surface of the cyst at the hard knot, no pressure pain. If secondary infection, there can also be redness, swelling, pain and other discomforts. 3. Allergy: baby lower eyelid out of a red bump, may also be eye contact allergens, resulting in baby eyelid skin allergy triggered by eyelid inflammation. The baby’s lower eyelids out of a red bumps, it is recommended that parents take the baby to the hospital in a timely manner to check, clear reasons for compliance with the doctor’s instructions to deal with.