Can cockroaches lay eggs in a humans hair?

Yes but unlikely.: You'd have to have a significant infestation for this to happen, and the texture of hair isn't what they're looking for to lay eggs. White egglike structures, especially if stuck to the hair shaft, are far more likely to be the nits of head lice. Cockroach eggs would wash off with a good shampoo or two; lice eggs will not and need to be combed out.