Possible causes of red bloodshot eyes in 6-month-old babies include conjunctivitis, dacryocystitis, and impingement. Conjunctivitis is a common disease in newborns, and children with short-term redness of the eyes, tearing, increased eye discharge and eye rubbing are considered to be probably caused by bacterial infection. It can be treated with antibiotic eye drops, the most commonly used drug with fewer side effects being tobramycin eye drops. If the symptoms of lacrimal sac infection persist for a longer period of time and the redness of the eyes increases along with the symptoms of continuous tearing, there may be purulent secretions overflowing from the lacrimal sac area by pressing on it, treatment can be considered by regular pressure on the lacrimal sac area to promote self-passage of the tear duct. If the symptoms do not improve after 4-6 weeks of compression, an ophthalmology visit is required for lacrimal duct exploration. In this case, the child may have red eyes and most of them will return to normal by themselves around the age of 4-5 years. If increased discharge occurs and symptoms are severe, surgery is required if necessary.