I get that with ivermectin. Started in july of last year. Have you tried albendazole. It's a different feeling but it causes them to move around. It's hard to tell because I take the albendazole with coconuts mostly. Eating coconuts with lots of cayenne pepper makes them move around in my stomach alot. I know that helps. Also taking the sauerkraut should help. Honestly buy some of the ozonated olive oil and try rubbing it on the area or if your daring try eating a small portion of it. That has been very powerful for me. I think it is helping the filariasis.