My son has broke out and is extremely itchy due to dust exposure
Dust mites are the main culprits behind dust allergy. If it is severe then consult doctor.
The first treatment for controlling dust mite allergy is avoiding dust mites as much as possible. When you minimize your exposure to dust mites, you can expect fewer or less severe allergic reactions. However, it’s impossible to completely eliminate dust mites from your environment. You may also need medications to control symptoms. Try some home remedies also take medication to control if it is severe.
Some home remedies:
Honey, Local and raw honey often contains small amounts of local pollen, which is believed to help with dust allergies.
Dehumidifiers are devices that pull moisture out of the air, drying it out, thereby keeping mold triggers at bay. Dust allergy is often caused by dust mites plus molds, both of which thrive in humid conditions.
Boost immune system by taking turmeric.