Why does my skin swell after applying light pressure, and what medication or treatment should I use?

You are likely experiencing a common and harmless skin condition called dermatographia, often referred to as skin writing. It occurs when light pressure causes your skin cells to release histamine, leading to temporarily raised red welts. To help manage this, you can use over-the-counter daily antihistamines such as cetirizine, loratadine, or fexofenadine, which block the swelling and itching. It is also helpful to wear loose clothing, avoid scratching, and keep your skin moisturised. This condition is not dangerous, but if it persists or bothers you, please consult a doctor for a personalised plan.

What medicine should I take for a dry cough caused by a dust allergy?

For a dry cough caused by a dust allergy, you should treat both the allergy and the cough. A non-drowsy antihistamine (such as cetirizine, loratadine, or fexofenadine) will block the allergic reaction. To quiet the cough, you can take an oral cough suppressant containing dextromethorphan. Additionally, using a fluticasone nasal spray can reduce post-nasal drip, which often triggers the cough. Try to stay well-hydrated and minimise dust exposure. If your cough persists for more than two weeks, or if you develop wheezing or shortness of breath, please consult a doctor for a physical examination.