I'm sorry to hear that you've been experiencing itching for such a long time after a fever. Persistent itching can be uncomfortable and may have various causes, including allergic reactions, skin conditions, or other underlying issues.

Since you have been taking Cetirizine (an antihistamine) without sufficient relief, here are some additional steps you might consider:

• Consult a dermatologist: A skin specialist can examine your skin to identify any specific causes such as eczema, infections, or other dermatological conditions.
• Consider alternative antihistamines: Sometimes, other antihistamines like Hydroxyzine (available as Atarax) may be prescribed by a doctor if Cetirizine is not effective.
• Skin care: Use gentle, fragrance-free moisturizers to soothe your skin and avoid hot showers or harsh soaps that can worsen itching.
• Avoid triggers: Identify and avoid potential allergens or irritants such as certain fabrics, detergents, or foods.
• Medical evaluation: Since itching has persisted for over a month after a fever, it is important to rule out systemic causes such as liver or kidney issues, which require blood tests and medical assessment.

Please do not start any new medication without consulting a doctor. I strongly recommend you see a dermatologist or your primary care physician soon for a thorough evaluation and tailored treatment plan. If symptoms worsen or you develop other concerning signs, seek medical attention promptly.To narrow down potential causes, we will need some more information.I understand you've been dealing with itching all over your body for 40 days after a fever. To better assist you, could you please share your age and gender?