«جِبْتِ الْأَقْرَعْ يُوَنِّسْنِي كَشَفْ رَاسُهْ وِخَوِّفْنِي»

At its core the saying captures help that backfires: a person called upon to get someone out of a predicament proves to be the very one who causes it. The expected remedy and the actual harm turn out to share a single source.

Because the speaker chose the companion, the line also carries a rueful note of self-blame. The bald man is a figure in the image, not a literal remark on baldness: uncovering his head becomes the scare, so the protection sought becomes the threat faced.

Suited to wry complaint when an arranged helper brings about the very trouble, not one who merely fails to fix it. It also fits commenting on someone else's poorly chosen helper. Avoid aiming it at a bald person, where it could read as mockery of appearance.