Your symptoms suggest a viral upper respiratory infection that has caused acute laryngitis (inflammation of your vocal cords), likely aggravated by post-nasal drip from your runny nose. For relief, I recommend complete voice rest and avoid whispering, as it strains your vocal cords more. Stay well-hydrated with warm fluids and use saline nasal drops or an over-the-counter antihistamine like Cetirizine (10 mg once daily) to dry up the runny nose. Do not take antibiotics, as this is likely a viral issue. If your voice does not recover in a week or if you develop breathing difficulties, please consult a doctor.

Since your itching has lasted for three months and worsens at night, it is important to see a doctor for a proper diagnosis, as it could be due to eczema, scabies, or even pregnancy-related liver issues (if applicable). For temporary relief, you can apply an over-the-counter 1% hydrocortisone cream to the affected area twice daily. Taking an oral antihistamine like cetirizine (10 mg) once daily can also help reduce nighttime itching. Keep your skin well-hydrated with a fragrance-free moisturiser, use mild soaps, and avoid hot showers. Please consult a healthcare professional before starting any long-term treatment.

Limited improvement is anticipated because Zyrtec is an antihistamine and is not a conventional treatment for psoriasis. Topical therapies, phototherapy, or systemic drugs given by a dermatologist are the most effective ways to manage psoriasis.

Zyrtec (cetirizine) may be insufficient for angioedema, particularly if swelling is severe or interferes with breathing, but it can help minimize moderate allergic responses and itching. Angioedema can be fatal, so get emergency medical assistance and heed your doctor's advise.