Trendy fish pedicures could spread HIV and hepatitis C, officials warned.
The Health Protection Agency said risks from the foot-nibbling treatment are "low but could not be completely excluded".
And it said those with diabetes, psoriasis or with weakened immune systems are especially vulnerable and should never undergo the pampering craze.
Infections and bacteria may be passed on by the tiny garra rufa fish themselves or through water used by a previous client and left unchanged.
Blood-borne viruses like HIV and hepatitis could be transmitted if infected clients bleed in spa water that is used again.
Fish foot spas can spread HIV and Hep C
