What causes black tongue and a purple patch on the skin after oral sex?

Question

Hi doctor,

10 days ago I had oral sex with CSW (Community Sex Worker) while drunk. I visited the GP (General Practitioner) the next day who gave me PEP(Post - exposure prophylaxis), now nine days. Yesterday, I saw a hairy black tongue and freaked out. Visited local clinic, was prescribed mouthwash and Miconazole cream and did HIV(Human Immunodeficiency Virus) 1 and 2 antibodies, due, hep B and VDRL (Venereal disease research laboratory)- all negative. Also saw a small purple patch on the right forearm. I am not sleeping, worried sick. I want to know the risk of HIV and if confirmed very low, what is probably going on with black tongue and a purple patch on the skin. Intend to get the HIV PCR (Polymerase chain reaction) test done in RSA (Respiratory Sinus Arrythmia) on day 13. Please advise.

Answer 1

Hi, Welcome to icliniq.com.

First, as per the history of 10 days contact, you will not possibly have HIV related symptoms. Second, the rash appears to be localized and not related to HIV or contact, it indicates local allergic reaction (attachment removed to protect patient identity). It resolves automatically or uses tablet Cetirizine. Third, black tongue, not sure by pictures, if any, can be due to Nevirapine, which can give that and please specify the drug in PEP (Post-exposure Prophylaxis). Finally, using PEP after exposure is very good and it nullifies any risk. There are no known cases of getting HIV, post PEP use. So, continue PEP as advised. You are negative and have very low chances but they are nullified by using PEP. So, worry not regarding HIV.

What causes black tongue and a purple patch on the skin after oral sex?

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