Does your baby embrace or withdraw from new things? If your baby reacts to new people, toys, sights and sounds with a big, beaming smile, she clearly has a high tolerance for strangers or new situations. That’s great news, but there’s also nothing wrong if baby is naturally hesitant, afraid or shy when faced with something new. Slow-to-warm up infants tend to think before they act. This can be a passing phase, or a sign that she is naturally more shy and needs reassurance and patience.