Teething typically starts between 4-7 months, though every baby is different. Common signs include drooling, gnawing or chewing on toys and fingers, crankiness, and swollen or tender gums. If you notice persistent fussiness, offering a clean, chilled teether or a cold, firm fruit slice like a carrot can provide soothing relief. While these signs are standard, always consult your pediatrician if your baby develops a fever or seems to be in severe pain.