I'm sorry to hear that you're experiencing persistent itchy patches despite taking cetirizine (Xyzal 10 mg). Itchy patches resembling ant bites that last for two months and do not improve with an antihistamine like levocetirizine may indicate an underlying skin condition that requires further evaluation.

Here are some important points to consider:

• Possible causes include allergic reactions, eczema, insect bites, infections, or other dermatological conditions.
• Since cetirizine, an antihistamine that blocks histamine involved in allergic reactions, has not provided relief, it suggests that the cause might not be purely histamine-mediated or may require additional treatment.
• It is important to have a thorough examination by a dermatologist (skin specialist) who can assess the patches, possibly perform skin tests or biopsies, and recommend appropriate treatment.
• Avoid scratching the patches to prevent secondary infection and worsening of symptoms.
• Keep a record of any new exposures, products, or environmental factors that might be triggering the reaction.

Recommendation: Please consult a dermatologist promptly for a detailed evaluation and tailored treatment plan. If symptoms worsen or you develop other signs such as swelling, difficulty breathing, or fever, seek emergency medical care immediately.To narrow down potential causes, we will need some more information.Please tell me your age and gender. I understand you've been experiencing itchy patches all over your body for two months, similar to ant bites, and Cetirizine (Xyzal 10mg) hasn't helped.