The blue nail theory has been a topic of conversation on TikTok, but what exactly is it? Ahead, an expert explains.

From sweet pale blues to deep teal and rich navy, we love how blue nails make us look and feel. Ombre nails are so cute! Try them yourself or ask your nail tech to do your blue ombre nails for you.

In Western medicine, tiny dark red spots on the nails, known as splinter haemorrhage, may suggest a potential heart problem, while a patch of tar yellow in the nail bed is typical of psoriasis ...