Please put pictures of the affected areas in good light in private direct consult with a dermatologist for best solution for the same online

Fungal infection or Ring worm.. when occurs in groin, called as jock itch.. Usually fungal infection is common in moist areas of body like skin folds..It's mostly circular or round in appearance.. May be red or black in colour.. Treatment depending on the type and severity.. Avoid sharing clothes, towels and soap; sweating also increases it.. Do direct online consultation for detailed prescription

This could be eczema or psoriaisis. Please send photos using online consult option for proper examination diagnosis and treatment

Since you are suffering from the problem four years