A line of heat patches for muscle pain is being recalled by the manufacturer following reports that some users suffered burns and skin irritation, Health Canada says.

Chattem Canada issued an urgent, voluntary nationwide recall of the back patch, and the arm, neck and leg patch from its Icy Hot HEAT THERAPY line.

Also included in the recall are single samples of the arm, neck and leg patches that were included in promotional packages of Aspercreme Pain Relieving Creme. The packages featured a yellow sticker reading "Bonus Icy Hot Heat Therapy Patch Inside," and had lot numbers C2125, C2126 and C2127.

The products are packaged in a red plastic pouch, which reads "Icy Hot HEAT THERAPY" and either "Back" or "Arm, Neck & Leg."

The products were sold over the counter through drugstores, supermarkets and mass merchandisers.

Chattem Canada says consumers should stop using the products, and discard them or return the patches to the company.

Health Canada says there have been four reports of burns among Canadian users. The organization says anyone who has experienced a rash or burn while using the products should discontinue use and consult a doctor.

A similar recall for the products was issued in the United States in February following reports of first-, second- and third-degree burns among some users.

No other Icy Hot or Aspercreme products are affected by the recall, as they are made using a different active ingredient.