Thank you for uploading the images for my better understanding.
This looks like ring worm.
They are skin infections caused by a fungus. These types of fungal infections are also called "tinea."
Some people call these fungal infections "ringworm," because they often cause a ring-shaped, red, itchy rash on the skin. But a ring-shaped rash need not always be there. It is like a ring below the ear.
You can catch fungal infections from anyone who is infected. You can also catch them from an infected dog or cat. Plus, you can pick up the infections from places where the fungus might be, such as:
●A shower stall
●The locker room floor
●The area near a pool
If you have a fungal infection on one part of your body, you can also spread it to other parts.
The treatment for a fungal infection depends on which body part is affected. If you have a fungal infection on your scalp, you must take pills that will kill the fungus. Treatment for scalp infections usually lasts 1 to 3 months. If you have a fungal infection on your feet, groin, or another body part, you probably will not need pills. Instead, you can use a special gel, cream, lotion, or powder that kills fungus (Lotrimin AF or Lamisil applied in a thin layer twice a day for 2 - 4 weeks). Consistency is the key in the treatment.
Treatment with these products lasts 2 to 4 weeks. If you have a fungal infection on your groin and on your feet, you must treat both infections at the same time. If you do not, the infection on your feet can spread to your groin again.
These oral medications are prescription drugs and you will require doctor's prescription for this.
Here are some other general tips on how to prevent fungal infections:
●Do not share unwashed clothes, sports gear, or towels with other people
●Always wear slippers or sandals when at the gym, pool, or other public areas. That includes public showers.
●Wash with soap and shampoo after sports or exercise
●Change your socks and underwear at least once a day
●Keep your skin clean and dry. Always dry yourself well after swimming or showering.
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