Deep Heat products are generally not recommended for use during pregnancy. They often contain methyl salicylate, a chemical related to aspirin, which can be absorbed through the skin and may pose risks to the unborn baby, especially with large or prolonged use. Medical advice commonly suggests avoiding Deep Heat, especially creams, sprays, and muscle rubs containing such ingredients, due to potential effects on bleeding, clotting, and complications during labor and delivery. Authorities such as the NHS advise against anti-inflammatory drugs and topical applications like Deep Heat during pregnancy, particularly after 20 weeks. If pain relief is needed during pregnancy, safer alternatives such as heating pads (used with caution and not on the belly), warm baths, or gentle stretching are recommended. If considering any pain relief product during pregnancy, it is essential to consult a healthcare provider first to ensure safety based on individual circumstances. In summary, Deep Heat is typically not safe for use when pregnant without medical advice, especially versions with strong active ingredients like methyl salicylate, and it should be avoided or used only under strict medical supervision.