Hi,
Noted the history of bites on sitting in grass, red and purple colored skin, all 6 larger than a quarter size.
Surely yes, you have to be worried for the following reasons:
First of all, we do not know what bit you.
Seconds, all 6 are large and have turned from red to purple center.
Hence I would advise you the following in such a situation:
Take an antihistamine.
Consult your Doctor for clinical evaluation as his past experience may tell you what was the insect and the prognosis.
Oral
steroids will be given if indicated.
Do not apply anything locally, do not fondle the area.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. T. Chandrakant, General Surgeon