Hello dear,
The symptoms as mentioned in your post can be due to:
1. Ringworm (tinea) infection
2. Contact dermatitis
3. Urticaria
The mass can be attributed to
enlarged lymph node, secondary to the infection/ inflammation.
Management involves:
1. Application of
Calamine lotion for symptomatic relief.
2. Intake of antihistamine preparations like Allegra
3. Application of
topical steroid & antifungal ointment like
Clotrimazole.
4. Antibiotics to prevent secondary bacterial infection.
5. Keep the area clean & dry.
6. Avoid wearing tight under garments & trousers, as they will cause sweat formation & predispose to further infections.
If symptoms still persist, kindly visit a
Dermatologist & get a proper clinical examination done to find the exact cause.
Wishing you a good health.
Take care.