###Human: What causes rashes with hard and dry red bumps in scrotum area? ###Assistant: Hello. Yes, Dettol is an irritant. It can make skin dry and cause bumps over it. Dettol should not be used. Kindly follow this prescription. 1. Apply Hydrocortisone plus Gentamicin combination cream. 2. Apply Vaseline (Petroleum Jelly) 4 to 5 times a day. 3. Take Loratidine 10 mg OD. 4. Wash with mild soap and water. 5. Avoid Dettol and other irritants. Follow up at three weeks.