My son is three months old and has a cough, kind of mucus sounding and is really tired and sneezing. no fever. what can i do?

Congested cough: At 3mo the primary cause of congestion/cough are irritants. House dust, fragrance, perfumes, detergent or cleaning products all leave scents that don't bother adults but irritate a babies nose. A good nasal clean out with saline can remove much of this irritant load, but removing the offending irritants from babies life helps more in the long run.Irritants aggravate colds ; nasal wash helps.