Recent NHS statistics show cases of dermatitis and eczema are increasing - and it could be down to gym-goers' cheap clothing and poor hygiene habits. A particularly problematic yeast species has been Malassezia, which can cause the condition pityriasis versicolor in high enough numbers. The areas most often affected by pityriasis versicolor include the trunk (chest and tummy), neck, upper arms and back. Several factors can increase your risk of developing pityriasis versicolor, including a warm, moist environment and sweating excessively. It's estimated around 1 in every 100 people in the UK has pityriasis versicolor.

Source: Daily Mail February 14, 2018 12:42 UTC