If you have a cold or mouth ulcer, you need to provide targeted treatment for the cold and mouth ulcer. In case of cold, nasal congestion and runny nose are serious, you can use cold medicine to relieve it, such as Aminogalactone Capsules, Senso-Kang or cold granules for adults. For children, you can use paediatric aminophenol pseudo-lax dispersible tablets, paediatric black beetle and clear fever granules or paediatric cold and flu clear fever granules for treatment, the effect is relatively good. For the phenomenon of mouth ulcers, you need to use drugs for topical application. You can use watermelon cream spray, sprayed on the wound of mouth ulcers, for the relief of mouth ulcers recovery, the effect is particularly good. You need to pay attention to keep your mouth clean and brush your teeth, which can promote the recovery of mouth ulcers. Spicy and irritating or acidic foods are not allowed to be eaten, which will stimulate the mouth ulcer and aggravate the painful symptoms.