A research study published in JAMA Dermatology showed a case of two middle-aged women, who had no history of skin cancer, developing tumors on their hands.
And the study has led to a rash of warning by MDs in the US, who have stated that individuals should be careful when using the devices, limit their exposure to the UVA rays, and even wear sunscreen during treatments.
The gel manicures have become very popular in recent years because the treatment means that the nail varnish application is much more durable, helping it to last for as much as two or three weeks.