For simple insect bites, you may notice a puncture wound on the skin, swelling, itchiness, or redness around the affected area, or a blister or bump around the site. 

If someone has been stung, there may be a sting still visible underneath the skin. They may also experience pain, swelling, burning, and redness around the site of the sting. 

For snake bites, the patient may have bite marks on the skin, pain around the bitten area, which may not be apparent straight away, and swelling, bleeding, or bruising from the area bitten. 

Other physical symptoms of bites and stings include: 

• Allergic reaction, which can involve extreme swelling in the area of the bite or sting 
• In the case of snake bites — nausea, vomiting, headaches, difficulty breathing, blurred vision and even cardiac arrest 
• Anaphylactic shock, which is a severe allergic reaction involving difficulty breathing, swelling in the throat, and collapsing