Aside from growth spurt, I suspect that my baby's probably teething, hence, his crankiness the last few days. How can I really tell that it's teething? What are the usual signs?

If you notice your baby is chomping into his toys more than usual or if he grinds his gums quite relentlessly, then it can be teething. Teething is classified into two categories: acute and chronic. Find which of these your baby falls into so you can properly address his condition