dear user you need not to get warried about these sores but simply we should find the cause and treat it these sores have more than one cause ......as it may be due to wearing tight narrow clothes and sweating or impaired cleaning .....as these simple causes lead to allergic reaction of affected area and forming these sores.......if you have not any of these factors there is suggestion of infection with herpes simplex.....herpes simplex infection cause sores in area affected and it become very painful and should be treated for that with antiviral drugs like acyclovir that will help alot......the good thing to do is to refer to adoctor to see it to reach definite diagnosis and not get worse........no problem of that as it is common complaint of many and you need not to worry...you should keep this area dry and cleaned with warm water and try not to scratch it .......wish you healthy life ..