By reading the post here, I started to suspect that I have strongyloides instead, because I also have outbreak feeling,--thousands of bugs crawling out of my skin from a bump, where underneath it, there is for sure a worm moving. That's why at the beginning I thought I have scabies. However, in my case 24 mg per day Invermectin + Albendazole did not help the situation too much. I don't know why.

This is very concerning. People come to the USA and get parasites but our doctors tell us they don't exist here and act like we are crazy if we haven't traveled abroad. Check into this and see if it is similar to what you have. Infections by Mansonella perstans, while often asymptomatic, can be associated with angioedema, pruritus, fever, headaches, arthralgias, and neurologic manifestations. Mansonella streptocerca can manifest on the skin via pruritus, papular eruptions and pigmentation changes. Mansonella ozzardi can cause symptoms that include arthralgias, headaches, fever, pulmonary symptoms, adenopathy, hepatomegaly, and pruritus (3). Eosinophilia is often prominent in all cases of Mansonelliasis. M. perstans can also present with Calabar-like swellings, hives, and a condition known as Kampala, or Ugandan eye worm (5). This occurs when adult M. perstans invades the conjunctiva or periorbital connective tissues in the eye. M. perstans can also present with hydrocele in South America (5). However, it is often hard to distinguish between the symptoms of Mansonelliasis and other nematode infections endemic to the same areas (4, 8).