Some people have severe reactions to insect bites which require a doctor's attention.
There are some spider bites which become infected .. like the brown recluse spider.
If you see a mark on your skin that you think may resemble a spider bite, examine the bite very closely. If it is a spider bite, there will be two separate "fang marks" about 1/16th of an inch apart. The next step is for the fang marks and surrounding tissue to eventually turn darker in color due to necrosis. The surrounding skin will be red in color.
If there is only one puncture present, the bite was more likely made by a mosquito, deer fly, or other insect. It may also be a sting or a thorn puncture.
Brown Recluses are not known to be able to bite through t-shirts, pants, socks, pajamas or even through thick epidermal layers of skin such as the palm of the hand or bottom of the foot.
In a short period of time, the venom in a Brown Recluse spider bite has the ability to cause major tissue necrosis. Necrosis is the death of living cells. The venom comes into contact with the living cells and they simply die. The result is a very painful and gruesome "flesh-rotting" open wound.
The severity of the bite wound can vary greatly with some bites going unnoticed while others reach the size of dinner plates. The amount of venom the spider injects can vary.
Brown Recluse spider bites can be difficult to diagnose, even by physicians. Diagnostic tests to detect Brown Recluse venom in tissue are not readily available.
As soon as 2 hours after the bite, or as long as a week, the area may become painful, itchy, hot, swollen, red and tender.
Prompt attention is the best defense against preventing the necrosis.
You should seek medical help - it will be best for you.