Severe itching with a skin rash can be due to different causes, and it is important to know that a true allergy and a bacterial infection are not the same, though they can sometimes occur together. Conditions like Contact Dermatitis usually cause itching and redness due to irritation or allergy, while bacterial infections may cause pain, warmth, swelling, or pus. Treatment depends on the exact cause; if it is an allergy, soothing measures like avoiding the trigger, keeping the skin clean, using gentle moisturisers, and taking anti-allergy medicines can help. If a bacterial infection is present, a doctor may prescribe an appropriate antibiotic cream or tablets. It is best to avoid using multiple creams on your own, especially strong steroid or combination creams, as they can worsen the condition if used incorrectly. Keeping the area clean, dry, and not scratching is important for healing. Since your symptoms are severe, it is advisable to consult a doctor to confirm the cause and get the right treatment, which will give faster and safer relief.