Nails / fingernails
Psychological (Freud)
Fingernails connect with the need for protection and self-assertion — at once weapon and adornment, an expression of how one presents and defends oneself. Brittle or bitten nails can make visible small, gnawing worries or a held-back inner tension.
Oriental reading
In the Oriental-Islamic tradition, nails often stand for strength, livelihood, and a person's vigor; well-kept nails foretell prosperity and good order, while trimming the nails may be read as paying off debts or shedding sins.
Body
Dream interpretation is for self-reflection and entertainment — it is not a medical or psychological diagnosis.