When there is forceful pinching there might be blood blisters. There would be red and fluid filled bumpy area. Now, since you have got a blood blister, all you should do is avoid the chances of infection too. There might be some pain too associated in this. Now, all you should do is take some steps so as to reduce the problem as well as the discomfort. This is what you should do:

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Remedies for Blood Blisters
1. Avoid any strain and remove it if on the blood blister:
If there is anything that is pressuring the blister then you should remove it. This will help you to remove any sort of pain that would be associated with the blister. Removal of pressure will help in naturally making the blister fine. Also, this will reduce the chance of infection.
2. Use the ice pack:
You should take an ice pack and then apply it on the affected area. Make sure that you do not apply ice directly. This is because if you do that then you will get lot of pain.
3. Apply aloe gel:
Aloe gel is useful in helping the blister get fine faster. You should use a good brand of aloe gel or the pure aloe gel as extracted from the plant. This will help you get rid of the blister soon.
4. Do not apply any sort of pressure on the same:
Some people have habit to touch or to pop the blister every now and then. If you do that the natural process of healing would be affected. Also, with popping the blister there would be chances of infection. Also, it would be better to keep it exposed to air so that it can heal on its own.
5. Blisters in feet:
If there is blister in the knee or in the fingers area then there would be more chances of rubbing or friction. In order to avoid that you should cover the area with a loose bandage. A tight bandage would make the situation worse.
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With the above remedies you will be able to get rid of the blisters a bit soon. When you get a blood blister, the main chance is that you might end up getting an infection right there. Your main aim should be to keep away from such things. You should let there be natural healing. If at all you want to drain the fluid in the blood blister, all you should do is go in a proper method. If at all you take wrong steps there would be infection in the affected area. Thus, if you are already suffering from an infection or if you have issues like cancer or heart problems then avoid doing this. If at all you are applying a bandage on the blister, you should first clean the area and then apply the bandage.
Blood blisters can be quite irritating and painful. Make sure that you let it heal naturally. This is because it would be the safest way.