Relative humidity is the percentage or ratio of the amount of water vapor in a volume of air at a given temperature and the amount that it can hold at that given temperature. An amount of water vapor in warm air will result to a lower relative humidity than in cool air.ummary: 1.Humidity is the amount of water vapor in the atmosphere while relative humidity is one type of humidity. 2.Humidity is the water content of the mixture of water vapor and other elements found in the air while relative humidity is the percentage of water vapor in the air at a given temperature.
Actinic keratosis (AK) is a UV lightâinduced lesion of the skin that may progress to invasive squamous cell carcinoma. It is by far the most common lesion with malignant potential to arise on the skin. See the image below.
Leukoplakia is a precancerous lesion that develops on the tongue or the inside of the cheek as a response to chronic irritation. Occasionally, leukoplakia patches develop on the female external genitalia. Leukoplakia is primarily a disorder of the mucous membranes of the mouth. It is caused by irritation. Lesions usually develop on the tongue, but they may also appear on the insides of the cheek. Irritation may result from rough teeth or rough places on dentures, fillings, and crowns.