For those triggers that cannot be avoided, you can try to compensate with extra care in other ways. For example, when your child has a cold, you can try to ensure he gets lots of sleep and nutritious foods. Some triggers may become more of an issue as your child gets older.
barnacle. n. 1. (Animals) any of various marine crustaceans of the subclass Cirripedia that, as adults, live attached to rocks, ship bottoms, etc. They have feathery food-catching cirri protruding from a hard shell. See acorn barnacle, goose barnacle.
The bristles allow barnacles acting as males to detect the chemical signals given out by barnacles acting as females. Once the male barnacle sniffs out a receptive partner, it uses its long, stretchy penis to reach out and mate with her.