Its because of spices allergy
Your body is allergic to spices like red chillies.
Ideally treatment for allergy is avoiding the allergy causing substance.
But its extremely difficult for spices because its one of the main ingredient in all our foods.
You can decrease the amount of chillies while preparing dishes.
Avoid eating in restaurants.
Oral anti-allergy medications like antihistamines can be used.
For skin lesions anti-allergy creams are available for local use.
You the symptoms are severe, you may have to visit hospital for higher care.