Hello Regina , I am Dr. Arun and will be helping you today.Your symptoms are suggestive of a condition called as paronychia. This is a nail bed infection. Following are the treatment;1) Warm compresses with half strength hydrogen peroxide2) Thumb splint3) Antibiotics4) Analgesics; Motrin5) Incision and drainage.Please read about it;http://emedicine.medscape.com/article/785158-overview Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
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And you don't think it can be a spider bite or anything like that?
I looked at the site on paronychia and do not have any sign of redness or sores like shown in picture.
Hello Regina,The internet would provide description of the classical picture and there are quite variation in individual presentation. An overnight swelling (redness may be absent in paronychia and usually present in insect / spider bites) with soreness, swelling, inability to bend is likely due to infection. If it is not the nail bed infection, it has to be infection in the surrounding joint or soft tissue. The treatment remains same as we discussed, though incision and drainage may not be required and only antibiotics and analgesics may suffice.It is privilege assisting you.