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rashes when i get hit in the arms

hey all , im here because i get rashes in my hands when i get hit by anything , whether it be by the pc desk or by a box or by my bracelet when i walk. sometimes i get lots of small bumpy circles together and something like if a something hit me in a sliding pattern in my hand i get a big all connected bump which is really embarrassing.  i mostly get them in the part of my arm where there is no hair the bottom part of my arms ( sorry don't know actual name )  also near my hands where my hand connects with the arm , also on the top part of my hand ...if anyone knows please help me
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Avatar universal
i been having it for 4 years or so what ever hits my skin makes those rashes for example i work with boxes right so if 1 of them just hits me and rubs on my skin ,even if it is only for 1 sec of hitting/rubbing a rash will appear and sometimes it burns
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Avatar universal

The description that you provide may indicate a kind of sensitivity called as presure urticaria and is caused by hyperactive immune protective mechanism.

However, this may also be a blister and there are several causes of blisters.

'Blisters are usually caused by injury to the skin from heat or from friction, which create a tear between the epidermis—the upper layer of the skin—and the layers beneath.

Short periods of intense rubbing can cause a blister, but any rubbing of the skin at all can cause a blister if it is continued for long enough.

Sometimes, the skin can blister when it comes into contact with a cosmetic, detergent, solvent or other chemical; this is known as contact dermatitis. This may also need to be ruled out.

It would be best to consult a doctor if it does not resolve on its own in a few days. Anti-allergics prescribed by a doctor may also be helpful.

Let us know if you need any other information.

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