The symptoms of a black widow bite cannot usually be detected at first, since it takes about forty minutes for you to feel the first symptoms. As mentioned before, some people feel a sharp, shooting pain when a spider bites them, but some do not feel anything at all.
Nevertheless, with or without pain, this spider will inject the venom into your blood stream. This is why the entire body feels the consequences of a black widow bite, and that is why you feel nauseous and weak.
The first symptom is pain around the bitten area.
The severity of these symptoms varies from person to person, as a person may feel heavy or mild consequences of a black widow bite. This depends solely on the victim’s immune system, and how the bitten person’s body will react to such a bite, some may feel severe pain and they will be in need of prompt medical surveillance.
As for what the eyes can see, there should be two red dots in the bitten area, which are usually followed by a rash. This symptom may be excluded as well.
Because of its tiny size the bite spot may be invisible for the eyes to see. This symptom is a minor one and it should not be a serious danger to the skin, unless an allergic reaction is involved.
The most important thing to be concerned about is the venom itself, and how it may, or may not, affect your entire body. The pains usually move towards your back and the abdominal area, since the venom causes muscle spasms. Nonetheless, these are not the only symptoms since the venom may cause restlessness, nausea, increased blood pressure and fever.
Black widow bite symptoms are not usually long lasting and they should be gone in a matter of a few days. Healthy adults have nothing to worry about since these symptoms last for a day or a few days max. Still, it is highly recommended for anybody who was bitten by a black widow to seek for medical help, because there may be some unexpected reactions that may affect the bitten person more severely.