At 630 cdt my wife slipped while helping yorkie out of the bed. The side of her head hit the nightstand. About an inch behind eye toward the ear. Bruised area reddish purple about the size of a quarter. The indention worries her. About 1/2 long. Minor headache, no blurred vision. Talks good, good balance. Has ice on it. What should I look for or should she immediately be taken to ER? Thanks, tommy