Itching between two legs , burning, producing heat and it us effected to penis .skin become very black and start bleeding also

Itching between the legs, burning sensation, heat production, blackening of the skin, and bleeding are suggestive of a fungal infection, most likely a jock itch. You can use an antifungal cream like Clotrimazole 1% twice daily on the affected area for 2-4 weeks. Additionally, keeping the area clean and dry, wearing loose-fitting clothes, and avoiding scratching the area will help in faster recovery.