A constant sore scalp is not normal and should be looked at by your doctor, to ensure that the sore scalp is not indicative of a underlying serious health condition. Some people keep a sore scalp and label themselves as tender headed and think nothing of it.
These are the four distinct stages in an average house fly's life: Egg: Depending on the size of a female house fly, she can lay up to 500 eggs in a three to four day period. Eggs are white in color and are usually less than half and inch in size. Larvae: Larvae are commonly referred to as maggots. Maggots emerge from the eggs within eight to 20 hours of being laid.
Adult and immature lice look similar. Adults are 1/10 to 1/8 inches long and tan to gray in color (Figure 1). They cannot fly or hop, but crawl quickly. Lice eggs (nits) are white when first laid. The nits turn coffee-colored (Figure 2) before they hatch. Nits are glued to the hair strands about 1/2 inch from the scalp.