Hello Tom,
Thanks for posting in HCM.
It is unfortunate to note that you have got bitten on hand by insect which looks like centipede.
Since you have already done some things for that and it has not responded so well, kindly do the following, which will help you to recover well.
1. Wash the bite area twice daily using mild antiseptic like
Savlon.
2. Apply ice packs to reduce pain and swelling.
3. Take anti-inflammatory and
analgesic combination like
Ibuprofen +
Paracetamol tablets twice a day after food for 5 days to reduce pain and inflammation.
4. Take Tablet.Levocetrizine 10 mg once a day for 5 days to reduce allergic reactions and itching.
5. Keep the hand elevated as much as possible.
6. Apply
Calamine lotion to reduce the swelling.
Keep the wound open, clean and dry. You need to take care that it doesn't get infected.
Hope the information provided would be useful.
All the best and wish you speedy recovery.