Thanks for posting question on HCM, You are probably suffering from acute urticaria perhaps due to sitting on grass ,start applying betamethasone lotion twice a day after taking bath and oral antihistamine like Lortadine 10 mg 1 daily .if the response does not occur in 24 hours take one shot of inj decadron 4mg IV stat. urticaria /hives; a vascular reaction of the upper dermis marked by transient appearance of slightly elevated patches (wheals) which are redder or paler than the surrounding skin and often attended by severe itching; the exciting cause may be certain foods or drugs, infection, or emotional stress,cold,insect bite etc Let me know if no response . I may ask for blood test,urine test x ray chest to exclude any infection. Hope this will alleviate your anxiety Regards Dr sher bhutto