Clothing giant Next is recalling two batches of children's T-shirts after they were found to contain harmful substances.
Parents who have bought either of the two items, part of the retailer's Young Boys collection, are being asked to return the clothes immediately.
The Enderby-based company has issued a safety announcement informing shoppers that the printed T-shirts contain a quantity of a "restricted substance" which exceeds an "acceptable level".
The Mercury asked the retailer what the substance was, but it would not say. However, the safety announcement, issued on April 3, indicated that it could cause skin irritation in young children.
The clothes are aimed at boys aged between three months and six years.
A Next spokesman said: "We test all products to ensure compliance to strict safety requirements.
"In this case, our initial tests showed the product complied. However, subsequent random testing has shown that some of the stock did not meet our strict safety requirements and we now have to take this up with the manufacturers concerned.
"While further testing is going on, we felt the best action for our customers was to remove the product from the shelves as a precaution."
Next would not say how many products were being recalled.
Business leaders said the issue would cost the company, but consumer safety had to come first.
Leicestershire Chamber of Commerce chief executive Martin Traynor said: "Obviously, a company like Next operates to the highest standards of quality and checks all its products to make sure they're safe.
"Once they find something is wrong it would be subject to an immediate recall.
"No doubt they've lost money because of this, but safety should always come first."
Facebook group Mums World, which gives advice on parenting, posted the recall on its page.
The post led to a number of concerned messages from mothers, some of whom had bought the T-shirts for their sons.
Mum Henrietta Burtinshaw said: "My little boy wore the blue one yesterday and had a rash this morning on his belly.
"I didn't connect the two until I've just seen this, will be taking it back! It was a birthday present, too."
Fellow parent Agnese Sneidere wrote: "I don't understand why the shops don't check the clothing first before they are sold."
People who return the T-shirts will get a full refund.
If you have any questions about the recall, ring Next customer services on 0844 8448911.
