11yr old son has Weird Chin rash, looks like bruise

My son has had this weird rash/bruise looking area on his chin for 3 days now, it has not gotten worse looking, nor better looking, it does not itch him, and it appears to be under the surface of his skin, (no raised bumps or areas.) And no fever, or changes in eating/sleeping, everything else about him is normal.
If anyone knows anything this would be a great help. Thanks.

[gami13]

He was complaining of stomach pains, 3 bowels today & they burned.

[Bhupinder Kaur, MD]

Hello,
For such a rash, allergic purpura is one possibility that needs to be ruled out. Purpura is a red or purple discoloration on the skin that does not blanch on pressure. It should go away on its own, but if it persists or grows in size then a dermatologist’s evaluation is required and get other causes ruled out which include allergic reaction, autoimmune diseases, thrombocytopenia, ITP or leukemias.

It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.

[gami13]

Thank you for your input, after some investigation online, we too thought that it might be purpura. After 5 days with this rash it started to dissipate, we did not get a chance to take him to the DR., although we will keep this incident in the back of our minds if he exhibits these symptoms in the future. On a side note I forgot to mention that he started exhibiting Acne pretty young at around 9yrs old, which could be a symptom of his Aspergers, (ie to maturing faster than norm.) Thank you for all your help!