How long can watermelon frost stay after spraying?

Watermelon frost spray, as a Chinese patent medicine for external use, usually takes about 30 minutes, and can be blown, sprayed or applied to the affected area. Sore throat and oral ulcer can be sprayed on the throat or ulcer, so that the medicine can stay in the affected area for a longer time as much as possible, so as to play a better role.

Try to keep the stay time, rinse your mouth with water before taking the medicine, and remove the food residue in your mouth; Try not to drink, eat or talk less for half an hour after taking the medicine.

The origin and origin of watermelon frost.

Annual vines. The stem is slender, creeping and has obvious furrows. The flowering and fruiting periods are summer. Watermelon frost is a white powdery crystal, which looks like salt and melts when heated. I like sand, sunshine, drought and waterlogging. Heat-resistant but not low-temperature, and the suitable growth temperature is 18-32℃.

Watermelon producing areas in China are divided into north and south, with Hainan Island as the main producing area in the south. According to its unique climate, watermelons are abundant all year round.

In the north, Hubei (located in the south of the Yangtze River basin) is the main producing area of watermelon, mainly concentrated in Yicheng City of Xiangfan. The famous producing areas of watermelon in Shandong are Heze Dongming, Weifang Changle, Qingdao Pingdu and Jimo. Others are planted in Hebei and Heilongjiang.