If your child suffers from chronic sinusitis, it may be because he has an underlying medical condition such as undiagnosed, and therefore untreated, allergies; some sort of anatomical problem in the nose that prevents drainage, such as a deviated septum; or chronically infected adenoids (the lymph tissue that sits behind the nose), which can leak bacteria into the sinuses. (babycenter.com)
A sleepy baby, use of nipple shields or various health or anatomical problems in baby can also interfere with baby's ability to transfer milk. (kellymom.com)
A common primary cause of canine conjunctivitis is chronic irritation and / or exposure resulting from anatomical problems of the lids (entropion, ectropion) or eyelashes (e.g., distichia, trichiasis). (dog-health-guide.org)