The shape of the nails is linked to the state of health and any change in the shape or color of the nail may indicate health problems, according to the "Focus" German medical site, which emphasizes the need to take nail changes seriously because it actually indicates that the body has serious diseases such as heart, lung and liver diseases.

Here are some indications that nails give:

White spots on the nail are often harmless air pockets that arise when the nail grows.

A dark brown color near black spots whose shape does not change is a potential sign of black skin cancer (melanoma).

Cracks of the nails indicate the presence of arthritis or autoimmune diseases such as psoriasis.

- If the nail form changes suddenly and becomes rough, this indicates problems in the heart, liver, or lung.