You seem to have developed an allergic skin disease in the form of skin eczemas
You should avoid applying any kind of skin irritants like dettol
, spirit over it.
You might need to apply a topical steroid
cream over the affected area twice a day for few days.
Take some oral antihistamines along.
See a nearby dermatologist
if the condition tends to persist despite this therapy.
You might need a course of oral steroids
Hope it helps,
Dr Kavita Paul.