It appears to me as a case of acute uricaria.The presentation of rashes in absence of systemic symptoms make diagnosis of meningitis
unlikely.Acute uricaria usually resolves over 3 weeks. It may be caused due to drugs, food, infection, antibiotics.
• Avoidance of the cause (where possible)
• H1 antihistamines
– Classical (sedating)- Chlorpheniramine
– Second generation (non-sedating)- Desloratidine
• Oral corticosteroids
(0.5 – 1.0 mg/kg/d)if not responding to above medication.
Hope it satisfies your query.